Secondly, I would like to transfer whatever property I purchase over to an LLC at some point after I move out, but I'm a little confused by some of the explanations I've heard regarding this process. 

For me, if there is any doubt that the person on the phone is competent, I ask them to transfer me to their Legal Department.

Yes, transferring title from an individual borrower to an LLC controlled by original borrower is exempt from Due on Sale- D1-4.1-02 of the Fannie Mae servicing guide, allowable exemptions-a limited liability company (LLC), provided thatthe mortgage loan was purchased or securitized by Fannie Mae on or after June 1, 2016, andthe LLC is controlled by the original borrower or the original borrower owns a majority interest in the LLC, and if the transfer results in a permitted change of occupancy type to an investment property, such change does not violate the security instrument (for example, the 12 month occupancy requirement for a principal residence).

Lets say 50% ownership of the building?

@Estefania Lozano the old owner is legally required to transfer any security deposits to the new owner.

Even better, when the Trust was closed the beneficiaries got to have the losses from the sell transferred to each of them as their own capitol losses. 

After the window replacement, some cosmetic work, leveling, and rewiring the house will be livable and ready to rent.My question is after I finish establishing the new LLC and have the property transferred to it, how do I apply for a line of credit to afford all the work to be done?

If B holds title subject to just the seller financing, can you JV with B, have B transfer title to the JV subject to the seller financing (with A consenting to this) and then just have D GC the project? 

Reconsider allowing small pets as covid has increased pet ownership.

If you have any ownership in other rentals or any other scenario with the bank wants to see your annual returns then you should be careful.