I also found a corporate housing solutions or possibly corporate express housing site that seemed quite helpful so I reached out to them as well.

Feel free to reach out, my team has experience lending as well

I would suggest reaching out to owners of multi family who have no loan on the property.

Please feel free reach out. 

For financing, I recommend you reach out to @Andrew Postell

If you want to develop it, I can refer you a lender that will lend on a completed subject to appraisal but you'll be limited if you just want it for the lot.If you simply want the land as part of your property, you have more options including a HELOC which you can still use for development down the road. 

I have seen this same house that is vacant (all the classic signs) I have located the owner ( I have not reached out to her yet).

I've seen other people in the forum who simply use independent savings accounts but it is not clear to me if that is legal.

Considering that, you are likely going to see appreciation year over year, which essentially will be additional equity you'd capture just by simply living in the home. 

If the latter, simply give her the notice required (eg 30 or 60 days) that she needs to move.