Plus I dont think any contract would hold up if a seller wanted out.this goes for unsolicited  yellow letters/ robo calls / robo text style of marketing. 

Account holders can't take any write-offs personally for investments made in the 401k.

Quote from @Christian Styles: Potentially able to help you find someone but I would need to know specifically where the property is in order to know who to recommend.  

I would notify her in person and in writing (big note on her door) including quoting the clause in the lease where she is responsible, and tell her you will be inspecting to insure the heat remains on, high enough to protect your unit, or she will be breaking the terms of her lease and also liable for any damage done in the downstairs unit as well.

I'd be looking at multiple structures. we try to build below the average new build cost in our market in Columbus Ohio which is 515,000 last year and we target land 40-50k and urban core adjacent where we get higher price per square foot. we build for clients with margin around $190 a sq ft depending on multi or single. we can get that down in our triplex it's a little higher on our single family homes because of garages and limited economies of scale. hope that helps. idk Philly but if you show me the area and styles of homes I can give you some more insights. 

If it is a private money/ commercial style  lender, it is a relatively simple process.

You have to get someone who is familiar with them and would want one.Here is a pic of this style of construction.

Purchase price: $7,800,000 124 unit Garden Style apartment community located near Oklahoma State University in Stillwater, OK.

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!

Using a HELOC for the down payment on the second home might be an option, but lenders may require you to wait a few months post-closing on the multi-family before approving new loans.The BRRRR-style approach could work if you can renovate and refinance quickly, but make sure the timeline aligns with your lender’s requirements.