Thank you for the input, I will measure the distance from the window sill to the third floor carpet, it's pretty low, let me see if I can attach pictures.

I feel maintaining your properties correctly and being decent to your tenants is the best preventative measure we as landlords can take next to LLCs, insurance, and umbrella policies.

Many investors use a general rule of thumb for midterm rentals that they should earn about 50% more in rents than an equivalent long-term rental (whereas short-term rentals should earn double or 100% more than if the property was utilized as a long-term rental).However, for DSCR lenders, change can be slow and challenging, and many lenders prefer and require more precise qualification measures than rules of thumb.

There is no appreciation beyond that like you have in real estate, but it is the easy answer to your question at the moment… and inversely related to real estate, so as interest rates go down on savings, real estate affordability will go up by the same measure (more or less). 

It's worth the $1k or so to take the correct measures.

I asked for measurements to arrange the replacement, but they took two weeks to respond.

However, without bug control measures, they can get out of control. 

It's a measure of cash flow relative to debt obligations.

Novices are at the whims of REACTION vs proactive measure. - Negotiation.

An approach you might want to take, is to break down each component of the rehab into its own price per sqft/linear foot/units for both materials and for labor.for example you might find that flooring costs and average of $3.50/sqft labor to install + $3.00/sqft for materials X square feet = cost to refloor+ always add an extra 10% for unforseensSo you would just need to do this for every part of the rehab based on what needs to be done and what level of finish you are going for.keep in mind that some things are measured by sqft, like floor, and others are measured by linear foot, like trim, and some are measured by total area, like drywall and paint, and yet others are measured per each like tubs and toilets.A good place to start with figuring costs is The Book On Estimating Rehab Costs by J.