Hi
1) - Yes all Zorro-II ram-boards for the A2000 are slow, fast enough for an A2000 with 7MHz 68K cpu but too slow for an 68030 or faster.
2) - Don't know, have seen such an expansion card only once at german ebay in the last 2 years. But even if you can get one: I think you need ZIP-rams for that board, these are also very hard to find (and expensive).
3) - Depends on your demands: An A4000 with A3630 or A3640 might be cheaper than a fast accelerator card with ram for an A2000. So if you just want to have a fast powerfull Amiga, you should look for an A4000 or an A1200 in a tower-case. The accelerator boards for the A1200 are much cheaper and easier to find than the ones for the A4000.
4) - Depends on your knowledge ;-) If you've never written an RTG driver and you start from zero, I think it will take you several month at least, if you work full time on such a driver.
Noster
