Car mechanics, HVAC, you get the idea. 

What downpayment or financing mechanism will you use?  

Efficiencies of scale, debt mechanisms, etc., will tell you to operate differently.

If you worked with a quality firm, they should be able to assist you with questions about the mechanics of moving funds around.The bottom line is that if all accounts are held in the name of the LLC and associated with the LLC tax ID, they are interchangeable - kind of like different drawers in the same desk.If the relationship with Stessa is in the name of the IRA owned LLC, you should be fine. 

The $15,000 is a filtering mechanism.

If this was a huge dump of a home that was built in 1890 and needed completely new mechanicals (electrical and plumbing) then I would actually consider it and exchange it for a home that is newer (modern layout, newer mechanicals)good luck

If you have it fully renovated, including mechanicals, roof, etc.

In most states it is very easy to file a mechanics lien against a property owner. 

I'm looking to build a 2500 sq ft two level ecofriendly single-family home which incorporates natural surrounding into the design, I'm trying to figure out what my cost should be for architectural plans: elevation, floor plan, mechanical, plumbing, electrical, etc.  

These would be properties with good roofs, windows, siding, and mechanicals.2.