You used to have to get a contract change form to the asset manager along with proof of funds but in the last couple of years the have not been requiring that.

This way, your capital requirement is lower and you get some experience in developing a community while your customers fund the construction.The benefit to your customers is that they get to choose everything about their new home, design the perfect place.Win - win!

My fear, is that I don't know too much about companies like B2R that will do 70% LTV at the 90 day mark.

Brandon's book on no or low money down investing would help a lot if you don't have much funds.

I have enough funds and am looking for a warehouse about 10,000-15,000sqft. with 2-3 loading docks, 3 phase power, within approximately 100 miles from DFW, with a purchase price in the $400,000 - $500,000 price range.

yes you can use the house you live in if there is no mortgage to fund your next flip. 

We are about 75% done with rehab and have temporarily run out of funding due to life changes.

All deals should receive a written offer with proof of funds.  

I have the opportunity to help finance a short term funding need for an investment I am an equity owner in.

Have you ever considered transferring the 401k funds to an IRA and then having the IRA invest in real estate?