Believe it or not I own a Mixed Martial Arts studio in the Northwest called The Source Academy.
We do several disciplines of fitness and MMA:
Gracie Jiu Jitsu
Muay Thai (kickboxing)
Okinawan Kenpo Karate
Filipino Martial Arts (escrima & Kali)
Jeet Kune Do
Tai Chi/ Qi Gong
We have authorized instructors who are directly certified by the founders in most of those. For instance our Jiu Jitsu is taught by a man named Anibal Lobo who moved to the United States with Rickson Gracie. I personally have about 25 years practicing and teaching martial arts...
And I just told you all that to hopefully lend credibility to my answer. There's a lot of great ideas in this thread:
1. Sparring - is necessary for development and to "prove" self defense
2. Stick with something solid, 2 days a week is great, if you really want to absorb what you're doing 3 days is optimal. All the students I have who train 3/4 days per week are leagues better than my weekend warriors and people only coming twice. Hitting the bag in your garage does not count as one of the days, but it helps! You'd probably see a gain if you did 2 days of class and a garage day
3. Do something APPLICABLE, I'm not knocking your art or choice of Hapkido and I'll get more into this in a seoncd:
Back to sparring: This ties into everything, you don't need to go to a place where everyone is going to try and kill you or break your limbs. In fact I would steer clear of any place promoting a mentality like that. I have worked with UFC fighters and several other coaches of prominence, NONE of them have promoted a rough violent attitude while training. Watch some pros sparring on Youtube and you'll get the idea. They aren't trying to kill each other they are trying to be TECHNICAL and LEARN. That's the environment you want. IT also has to accomplish a sense of realism in some way shape or form with the OPTION to increase the intensity.
Be on the lookout for a place where the long term students can easily and handily work over the new recruits with little to no effort. If someone claims to be a black belt of this or that, they should be able to prove it by barely putting energy into their techniques and easily scoring or diffusing an attack. Any amazing Gracie Jiu Jitsu coach will be able to do this, as would a pro Boxer. If the black belts or high level people (sometimes there's no belts) have to get "tough" to beat the new students it usually is a sign of a lack of knowledge
Which leads me to point 3. Applicable training should provide these results, it should be effective, you should be able to spar with it in a controlled manner, it should deliver self defense, and the people who claim to be highly skilled should be able to perform these moves against resisting beginners with ease. IF the place is really sharp, the beginner can actually have a background in another style, be a wrestler, etc... and the top students should still be able to perform. Never listen to "oh that's not my style" or "it doesn't work in that situation." That can be an answer, but if its a common one, get out of there fast.
If you are content and you feel satisifed that's great. 90% of authentic training will work in the street for self defense when it's done correctly. There's a simple saying in this field that goes "you have to make it work." There aren't any secrets and the knowledge of something like Muay Thai isn't going to save you unless you practice it, spar it, and develop it on your own under guidance.
If you look for something like an MMA school, look for a place that has an education with credentials in everything they teach. Don't settle on "it's a mixed progressive style." That's a load of BS! Even if they have fighters, are they winners? And are they qualified in Muay Thai, Wrestling, AND Jiu Jitsu. If they teach MMA and are only educated as a wrestler the other areas usually suffer. In fact at our place no one person can do it all and we have about 10 different coaches on staff.
Good luck! Martial arts can be a fantastic and rewarding journey, the one thing I hate seeing in the sport is regret after someone has trained at a lackluster place. Just don't waste your time and money and GET what you're paying for and you're well on your way.
/end excited rant!
Living the dream - One life at a time!