I'm having a hard time finding any estimating tools for this kind of a project, adding a story and multiple BR/1 BA, and wondered if there were any tools, sites or recommendations any of you have for this kind of a project. 

Be sure to check out the free tools BP provides to help analyze deals you may have and also market insights.

.- Write and publish 52+ high-quality articles on adding the build-to-rent and build-to-sell business models to your real estate investment tool belt.Are you doing all of these in San Antonio?

FF is a great tool, but you can also look up local corporate leasing companies, as well as, insurance companies/agents to work with for individuals who are going through home insurance claims.  

We think a smartphone app-type, GPS-enabled time tracking tool for tasks and hours would be a good start.

Check county recordsUse online search tools like PropStream, Reonomy, PropertyShark, etc.Use local GIS mapping tools (ask your county)Search online directories for LLC or TrustTalk to neighborsHire a skip tracerSend a letter to the propertyThere are a lot of options.

I'm curious if there are any other marketing tools that have brought about success. 

It is actually just a tool to create the already mentioned accelerated depreciation.

Yeah, when all of these eventually blow up and a bunch of consumers have their credit and finances wrecked and lose homes, my guess is that more regulation will come down to effectively ban Subto for residential mortgages

Great tool