I think the only solid way of determining repair costs is by having a trusted contractor walk the property and assess it themselves. 

Since ADU rules were liberalized by Seattle in 2019 (one attached + one detached allowed on any single-family lot, no owner-occupancy requirement, no restriction against separate sale). a number of spec builders in Seattle have been building what may look like a townhouse triplex but is legally a single family primary homes plus two ADUs, one attached and one detached. 

The owner is out of town and he got burned by the third party (they took off with rent, records, etc.) he tried using as management.

As to property being bought in 22 for 60K and flipped by a wholesaler for 120K, that means nothing on its own.

@Colleen F.I know a landlord that provides a discount for paying in the 1st by $25.

Regardless of where you live, Texas allows the formation of this type of LLC by a single member.2.

.- Given the fact pattern it appears that they are aiming for a Rent Escrow Action against me in court even though they have no basis.Questions- Should I respond to the repair letter?  

If you are looking at potentially selling it in a year or two, you could see some equity increase by adding a bedroom.  

"My name is Isaiah, I am a local investor looking to start my investing journey and have started by identifying some properties with long-time owners with good equity.

In most common methods of wholesaling you are NOT a principal, you are an intermediary.8.