It's definitely a variable depending on local conditions.

- What other variables or specifics would you need to be able to give a good answer?

You will need to go to a plumbing supply house to get it. 

I worked for a building supply company stocking the warehouse, filling customer orders, driving trucks to deliver lumber, shingles, and sheet rock.

(Happy to supply rental comps)

But since I'm ineligible, I think this 6.5% variable student loan has to go first. 

Any other variables we should consider? 

home needs paint, here is a list that I got quoted $7,500.00 forIve bought wall paint alreadyHe is supplying everything else, tape, brushes, trim paint ETC.Paint entire 3150 Sq ft home Paint ceilings Repair texture and paint water damage in 3 areas of the ceiling Paint entire 2 car garage Paint all oak cabinets White, sand, prime and paint correctly off hinges probably 25 doors, and 15 drawers Paint all 12 doors paint stair case wood polespaint baseboards 

Of course, the biggest variables, vacancy and maintenance, cannot really be predicted with any accuracy until one has owned the property for a few years, or has a similar property nearby to gauge by.  

Supply and demand drive rental prices much more than the stock market.