The issue is that I am planning to buy the property under a new single-member LLC that would also be treated as a disregarded entity for tax purposes (let's call the new one Wall Street LLC).If the ownership of Wall Street LLC and Main Street LLC are exactly the same (both 100% owned by me, the sole member), does the sheer use of two different LLCs risk triggering any tax obligations or breaching the 1031 code?

Does anyone have any funding sources that would be willing to work with a newer investor and use the property for collateral to secure their investment for the the rehab funding?

There is no specific science to it, and I would use more than a single source for rent estimates.  

Sorry, I can't recommend a particular source.

If anyone has any tips, alternative methods, or source material to throw my way it be greatly appreciated.

Houston Real Estate Highlights in NovemberSingle-family home sales rebounded from a slight decline in October, rising 3.9 percent with 8,320 units sold versus 8,010 in October 2020;Days on Market (DOM) for single-family homes dropped from 46 to 35;Total property sales rose 5.6 percent with 10,216 units sold;Total dollar volume increased 20.6 percent to $3.7 billion;The single-family average price rose 12.6 percent to $383,807; The single-family median price increased 16.3 percent to $314,000 – an all-time high first reached in June of 2021; Single-family home months of inventory registered a 1.6-months supply, down from 2.1 months year-over-year and below the national inventory of 2.4 months;On a year-to-date basis, single-family homes sales are 12.0 percent ahead of 2020’s record pace and 22.2 percent ahead of 2019.Townhome/condominium sales rose 16.8 percent with the average price up 16.0 percent to $258,970 and the median price up 10.5 percent to $210,000;Single-family home rentals rose 7.1 percent with the average rent up 8.5 percent to $2,042; Townhome/condominium leases increased 5.1 percent with the average rent up 3.8 percent to $1,737.Source HAR 

Pm me if you want some info on the different types of lenders that finance parks, what to expect from each type, and how to source them.

@Gabriel Heath Stine, I assume you are the sole owner of the LLC, and therefore it is a disregarded entity.My wife and I did just this.  

I started calling agents in Dallas today and the 2 agents I spoke to both wanted me to sign a work agreement, meaning I will have to pick solely 1 person to work with. 

Moving into the investment side of things and I am spending all my free time soaking up knowledge from every source possible.