I get the feeling. I used to own about 10 cabs at the some point, and it can become overwhelming, especially with all the tech support and the space. I eventually sold my cabs (but kept the mvs carts) and now I play on a supergun with an OSSC setup on a big lcd screen. I was scared I would miss my 4 slots MVS, but after a while, you'll get used to it.
I was lucky and got into neogeo when the carts where cheap, but if you just want to play the games, try to locate one of the fixed versions of the multicarts. I own an older 111 in 1 and it covers most of the big titles, and sometimes I just use it instead of pulling out my carts.
Of course, the multicarts are not always the best, it's all documented out there, but it's a super cheap alternative to the NeoSD and such. I mean, you pay for what you get.
