Sources for fabric/other questions
We are doing the same thing. Replacing a very complicated bimini/full enclosure with eisenglas, screens and over-covers. It is all within reach with reasonable care. Ours is coming out great. But it is slower than "point and pay", but tons cheaper and IMHO, you can get at least as good a job, probably better.
The fabric of choice is Sunbrella.
Sailrite is a good supplier--not necessarily the cheapest, however. We got some Sunbrella from a supplier in Ft Lauderdale over the internet considerably cheaper.
For machines--we are using the Sailrite machine and it is fine. However, not cheap and not in your price range. I cannot comment on other machines.