It could be any side-hustle you want just as long as you like it and your able to save some extra $$$.2.

Lipstick / cosmetics go a long way.Just my 3 cents.

Ask them the requirements for a permanent or temporary residence and any short term (less than 30 days) or long term rental restrictions. 

I was already a licensed broker for a long time selling real estate, and as I began managing buildings, I had to get my managing broker's license. 

MF hedges against market shifts and cap ex. also doors are a multiplier X so if i have 100 units under 1 roof and 1 of my tenants moves out and trashes the place well thats only 1% of my expense.. as opposed to 1 SFR which would be 100% of my expense.. the only aspect I could potentially agree with is the liquidity.. but lets start off with IF you are investing in holding real estate then you SHOULD be holding LONG TERM. so liquidity is only a tertiary calculation.

Can they prove how long it takes to rent a vacant property?

As long as it will pass an appraisal and not be "Subject to" major issues you can get a renovation or personal loan for work.Unless you are cash fluid and can add some cash back into the property and then pull back out on the ARV refinance.

Long term financing will require a minimum of 20% down on an investment property.

I'm not sure if you're house hacking, but commonly suggested marketing sites for long term rentals are zillow, apartments.com, and Facebook.If you're interested in doing short term rentals Airbnb, VRBO, Booking.com, and Furnished Finder.I hope this helps!

Seems like this will be a long drawn out issue that could can easily be resolved with proper lease language and lawn care.