The dollar has been getting stronger not weaker. 

But that means my capital is tied up for a least 6m.Assuming the above is true, how are investors able to get a house, rehab it and refi it so quickly?

The fear of loss is stronger than the desire for gain.So if you can't get her on board, and you are serious about a forever life together,  perhaps try a strategy that has much less possiblilty of monetary loss, like a sandwich lease/option, or wholesaling. 

I'm currently tied up in the first one and would like to purchase the 2nd one as well.

No financial reason to tie up huge amounts of capital with extra down payment dollars in this rate environment. 

If you had a M2M lease, you could just terminate their lease with 30 days' notice and cut ties with them completely. 

most of the bigger HML shops are tied into national data bases so they can do a computer search on your entitles and establish your experience .. also they do in house valuations.. which is nice you don't have to wait or pay for 3 p appraisals.. they charge 199.

If your partner has all their money tied up in other deals, what if they don’t have the solvency to add extra capital if need be?

Personally I wouldn’t tie up $850k-$1m in a deal with this much risk.

On that condo fee for 531 Main street, i believe it includes heat and hot water,  I think there is also so roof and facade work tied in there.