Not having W/D hookups in the units reduces their attraction to new tenants, but there is no practical way to add such.

If you have 1000 intelligent posts on BP you'll be a lot more attractive to investors/etc. 

There is also an SJREIA event coming up that @Joseph Scorese has advertised here on Bigger Pockets about attracting Private Lending.

However, we get these types of calls and often still refer the buyer to other agents due to workload, so you're going to have to make your call very attractive for the agent to call you back. 

Knowing that I got a 3.25% rate initially, what new rate percentage would you say would be too high to make refinancing now less attractive?

It might slow a little more due to immigration policy change but the attraction is drawing both domestic and international immigration.

Also, after I had proved myself, I attracted capital investors.  

Real estate is mainly an attractive investment because it can be leveraged.

Campgrounds require one of two things to be successful .1-On or close to an interstate highway for over night campers,or2- a destination location,such as beach (me) or mountains.Last is amenities, pool, game rooms,on site laundry etc... biggest mistake you can make is put all your money in spaces  and nothing built to attract campers!

There are really two prices: the market value of the house, and the strategic marketing price of the house.You set the price where it will attract tours and offers, not necessarily where the "value" price might be.