It is amazing how much easier and cheaper to maintain a salt-generator pool.Extremely simple and easy to add the system to your filtration system yourself.

I guess because they were spraying and it was cheaper.

Just wanted to followup with you, here is an article about metal roofs you can read. as @Matt Gragg pointed out, yes, if you are by the ocean it can corrode a lot faster, but it depends on the material you use, the cheaper material will corrode and thats why you have to do your homework and see how much you want to spend. here is the article: http://www.metalroofing.systems/top-70-metal-roofi...

Its always cheaper to do it yourself 

@Chou Yang Cleaning costs can vary, mine run depending on property anywhere from 10-20 percent a year but I have a private individual (cheaper) but I also pay them for other management activities and to be an on-call resource (more expensive)

We provide the mower much cheaper than knocking rent down for them to provide their own.  

But here's a rough idea of the basic steps involved and what it cost when I did it: STEPS:~ Drain the pool~ Remove pool equipment & cap off water lines~ Remove/cap off any unused electrical~ Knock down the edges around the pool and make holes in the bottom of the pool for drainage ~ Fill pool with "clean fill" material (i.e. soil, gravel, rock, sand, etc)~ Tamp the fill material as you put it in to compact it and reduce the chance of it settling over time once it's all fullCOSTS: (we did the labor ourselves so this is just for the material)~ $450 to buy a jackhammer to knock down the edges around the pool and also to make the holes in the bottom (we could have rented a jackhammer for cheaper but this way we own one and can use it on future jobs)~ $1600 for the fill dirt (it was a lot of dirt!)

I doubt your tenants in park owned homes will leave unless there is a cheaper, nearly equivalent option nearby.

I did the same kitchen with cheaper all wood RTA, delivered assembled ( as these were) for around $1300.

I could move to a cheaper apartment while I continue to search.