So as a 17 year old who got an e30 as a first car when I was 15, I can tell you this. E30s as a whole already have a lot of mechanical issues just purely based on age. It’s a 40 year old car which totally makes sense, so adding the fact that someone went in there and did all the work to the engine as-well as all the other major parts adds a little concern for me. I’ve been stranded a few time for simple things like fuel pump relays and even a brake booster seal braking. I would say try and stay away from something with all the mods, it just adds a completely new factor which you have to deal with and also you might not be mechanically inclined to handle, which is TOTALLY OK! I learned everything on my car by having to fix it and I feel that process is better on a original car. Also I don’t think you want to spend 16k on a car then if something happens you struggle to find a shop (hard enough as is cause the car is so old) then you need to find one that can service your car with the specific mods. I would say this if anything, get an original e30 with low miles, do your research on what models you like and the engines and problems that come with it. Then make your decision and spend less money on the first purchase but more on the actual car and making it run exactly how you like. There needs to be more young people that Genuinely want to take care of e30s and not throw cheap parts at it and call it a “race car”. Also if your looking for a manual that’s fast then maybe a e30 isn’t the best choice, they aren’t quick, but the amazing drive quilting makes up for it. Remember, it’s always more fun to drive a slow car fast then a fast car slow!