Big ticket items are expensive and usually more difficult and disruptive to install when a tenant is living in your unit. Your thinking for a long term buy and hold needs to be 15-20 years. Its a lot easier to plan ahead and look for a property that is priced low enough to allow you to do a major rehab upfront prior to renting it. The reason this make the most sense is that you are able to finance all your high priced items into your mortgage and then your ready to go 15-20 years without any major surprises and hopefully less ongoing maintenance along the way. Choosing finishes, flooring and major mechanicals that are quality and long lasting will save you money and headaches over your ownership period.
There are not many single family rentals that can support large capital expenditures paid from cashflow every few years and still remain reasonable profitable. If the cashflow cannot support regular major upgrades every 3-5 yrs will have to come out of your own pocket, ouch!
Rents in your market are what they are. You should have done a good market survey with some boots on the ground visits to your competition to see the range of what you can get for the product you are offering. I think many would agree that 2BR/1BA in a Miami class A unit will not be the same as class B to B+ of the same size in that same area. You need to try to work the analysis problem backwards and figure what is the best rents you can get for the level of renovation you plan to do. If you know your renovation costs like you should then you can look for a property that will fit your plan to renovate upfront and still leave you with a decent NOI while financed with a 70-75% LTV loan. Once you have done a few of these you will have nice tight numbers for the whole process that allows you to know quickly if a property your looking at will fit your mold. After that its like Monopoly for real.