Many of my clients keep using the traditional bookkeeping methods they already had in place even after switching to the Texas Series LLC.Ultimately, a Series LLC formed in a "friendly" state like Texas will be cheaper than forming a ton of Traditional LLCs, where you may have to pay fees and annual taxes.

I've used Trachte for traditional buildings in the past and have also been pleased. 

Think about other financing choices, such as traditional lending or innovative financing alternatives for homes with several units.

That being said, another option is to use a traditional accounting software like Quickbooks.

Short-Term rentals are treated differently than traditional rental property.

This is why traditionally they only let the rich participate, no one cares when millionaires lose the 2nd home because of bad investments.For non-accredited we are in uncharted territory. 

What taxes do I owe if she only assumes the remainder of my mortgage vs selling the property to her the traditional route?

Based on my limited experience, I have found that credit unions are much better suited for this than traditional banks, but YMMV.  

Essentially I am finding and procuring the land/lot via traditional financing and funding everything through the development phase until we get to Construction Loan. 

Traditional mortgage?