EB-5 you can do for $500k plus transactional costs and probably shouldn't go into the business anyway.

E2 absolutely agree it just feels like deferring the problem to a later date. A lot of exposure for not as much in return.

I think the bottom line is you don't need to be in the US as much as you needed to before, given your track record. Here the US should need/want you more than the other way round.

L-1A is probably quite doable though and it's dual intent. You need to wait a year, but that may have passed already anyway.