I started w SFRs then moved to a 4 plex and bought a MHP w 23 spots last month.

Even if there are few stains or worn spots, the natural hard woods are the cheapest to do and so I save money over the long run. 

There is a good deal on a short sale in a localish large (300+ units) summer only rental spot.

However the evidence of some marks and the previous owner having used some kind of water blocking paint on some of the walls and the resultant efflorescence at particular spots concerns me.I had a few waterproofing companies come in to assess the situation.

You are in the best spot here at BP!

Decreasing is very easy though :)If you do want to try increasing, one big factor to check is that the lot size is big enough to support the number of units you're aiming for, based on current zoning - including especially car parking and bike parking spots.

Spot on Scott!

I have been thinking about  taking over every market in the USA, with website I would develop with SEO and take over all the #1 spots.

IF you bought a 3x2 w ADU, and rented two beds and the ADU, you'd be in a much better spot.

Plus if there is cell phone reception it is even better as you can make a hot spot.