Or, would it be pointless since the original funds were taxed, the yearly returns were taxed, and, since it's typically a minimum 3-5 year investment, is there any capital gains tax due to the length of the investment? 

Ways to pick- consider showing behavior- consider length of employment- consider responsiveness dont let the second choice go until the first makes the deposit.

If the lease is in such bad language, can I have the tenant resign a new lease under the same terms of rental amount and length?

The water meter I don't think has anything to do with the pressure, it is the length of the supply line to the house that may have an impact.

So if the transactions is not an "arm's length" - they should stay away from it as far as possible.

Ive got a few tattoos...and they are visible when I am wearing a tshirt depending on the arm length of the shirt.

All contracts are assumed to be at arm's length, you must show that a contract is not when raising such a claim, it's not the contract it's the parties to it.

@Allen FletcherAll transactions involving your IRA must be 'arms length'.

For Miami there are usually minimum lengths of time that you can rent out (bare minimum 6 months) or sometimes not short term and only for 1 year.

Also the previous mention about ending a lease after the initial term ends does not appear to matter in this case, i.e. it doesn't appear you can evict a tenant at the end of an initial lease term; instead, their term would just go to month to month, or you would have them sign another similar length term.