Hmm,I see alot of people are saying 2Mb isn't enough, looking back I only ran single disk games so maybe that explains why I said it was fine for me.
There was a RAM upgrade that plugged onto the 68k CPU that gave you either 4Mb (PCMCIA active) or 8Mb (PCMCIA disabled). Though if you want one of these things I doubt they are still being made. I really would like one myself if im honest. 
Best of luck with the project.
It shouldnt be too difficult to create a ram expansion, a bit pricey, but certainly doable as a home hobby project. I am thinking on sram attached to a cpu socket converter and using the addmem command to add this memory to the system.
Yes, it doesnt sound difficult at all.