Btw, you can probably get away with treating employees at a factory making widgets a little worse than you can a high quality tradesmen, as the tradesmen's skills are usually  portable.  

I'd probably keep the AC units in there or switch them out for portable heat pumps.

@Gabriel GrahamSquare footage only counts towards Gross Living Area (GLA) if it is permanently heated, and portables heaters don't count.

If you allow dogs, and your tenant asks if they can put up a small, portable fence unit, and it's not hurting anything, and they are good tenants, then use your best judgement.

Why not make sure all the windows open and have screens, and offer to rent them a portable AC for $25 a month additionally($300 portable unit pays for itself in 1 year).Fenced yard may get you additional monthly pet fees.

If they know you and like you they will be less likely to call the police if there is  problem and just call you.This is my portable cookout setup. 10' trailer with a ramp gate. 2 grills with side burners. 

One is more portable.

I love my portable electric oil filled radiators and was inquiring if anyone knew of a domestic version that can be wall-mounted for permanency yet be plugged in to avoid rewiring.

I haven’t been able to test it out yet, but the previous occupants had a portable fireplace in there.

As far as the window is concerned to make sure it is large enough also you might want to consider purchasing 2-3 Story 25-foot Portable Fire Escape Ladder like this if there is only one window.