@Tom OchiengI would reach out to a real estate attorney for specific advice on this situation since you already have one tenant who is being difficult.On a side note, when I have inherited tenants, I have been most successful when I have provided longer non-renewal notices, like 60-90 days, and offered to assist with moving costs.

It's a very simple and effective tool that you can use when evaluating rehabs, whether you're looking to flip or BRRRR. 

After pointing this out, I would have expected the cost to be eaten by them.

However, I still struggle to understand the art of estimating rehab costs. 

Washer/dryers are often abused, so there's the initial cost of purchase and the risk of increased repairs.

You will incur more lending costs but you will only be in the first loan for 6 months.

Quote from @JD Martin: If you have found people willing to lend you - someone with I assume no experience doing this, since you're here asking the question - 100% of the costs of such an endeavor for half the profits, you have found a gold mine and should look no further.

I expect the work to cost about $150k plus or minus $20k.

You could certainly reach this demographic, but it could also cost you substantially more than the return.For the money, your best bet is probably a dedicated website for your property with the key words that you want to convey.

Startup costs paid out of pocket should be recorded as capital contributions and may be deductible as startup expenses or amortized.