Yeah its kind of hard to take a picture and make everyone understand what they're looking at too Lol flex PVC could probably work but I'd still have to take the tank off in order to get the old one out. I've already nudged the pipe a couple times and water starting leaking from the bulkhead and its as tight as its gonna get so its definitely a big concern. But with this planning and semi breakdown, I could save up for all the equipment I really want(without making impulse coral/fish buys) and take my time with it. Saving money is a big factor for me at this time.It's hard to visualize this without a picture. But have you considered flexible PVC? It may work from your description. You will get a new bulkhead...
I'm not gonna go into anything but let's just say saving money is a little more important right now then my tank. It just seems like this is my best move right now for numerous reasons. Yeah, I'm not really a fan of having an empty tank but if its going to make things better for me and my gf down the road with money, then I think I have to do it.