5-10k if you buy the materials and do it yourself otherwise multiply that number by a factor between 3 and 10

Repairs done by Landlordwill be billed by the job or as labor plus materials."

Create some basic marketing materials that explain who you are and the services you provide.

@Shannon Glanton, I certainly have a different background than many here, but the real estate license material (and exam for that matter) provided little to no help in my investing.  

By saying the last few years have been slanted to a sellers' market, are you referring to low supply and high demand, which has driven housing prices up.

If you're looking for a "value-add" property that needs a bit of work, the biggest risk that most of our clients run into is deferred maintenance and capital improvements as labor and material costs have gone up.The most non-extraordinary way that I've seen people making millions from house hacking is by simply buying a multifamily at a fair price, in a B- area, consistently raising rent, minimize vacancy, address maintenance issues, and just hold on (refinance and repeat).Hope that's helpful. 

I didn’t see the need to include the stabilized value considering as you mentioned, construction loans and down payments are driven by the LTC.

The cost will also vary from market to market, and the issue with plumbing is you often don't know how difficult the job will be until you're in the middle of the job.That being said, I'd say this could vary from the cost of a service call/trip charge + an hour of labor + materials ($250-$500 total?)

I've driven through the town twice over the years.

I also did a lot of labor only projects where i would buy the materials and pay the guys by the day to get it done.