I believe they need to put rent in escrow if they withhold it. 

Tell your tenant he is responsible for all costs associated with the flood, if he decides to leave withhold his money and tell him you will take him to small claims court for all additional costs. 

If it is unenforceable, then you will need to give the tenant at least two days notice before every entry, and try to get their consent, which the tenant is not allowed to "unreasonably" withhold.

Self Employment Tax is exactly the same as the FICA tax you pay as a W-2 employee.Here's how it works.As a W-2 employee, your employer withholds 6.2% as Social Security and 1.45% as Medicare.  

Living on a sailboat or in a camper can have some issues you won't find in a traditional house-- your "plumbing" situation is not going to be as seamless as what you are use to in a house or apartment... you'll have to deal with holding tanks and sewage treatment and disposal, macerators break all the damn time, 6 gallon hot water heaters, filling water tanks, space is small inside (and often outside), insulation is usually non existent.

We gave the landlord a formal notice on july 1st, telling him we will be withholding our rent until he fixes the problem, nothing has been done to fix the problem yet the manager is asking us for the rent already.

there is a very precise way it needs to be calculated using the useful life left of the damaged item to calculate the amount you can withhold for example if carpet was damaged and the useful life of the carpet was 5 years and the carpet is 5 years old you cant charge them at all    To answer your question I would create a deposit accounting and describe in detail what you are charging for .  

I understand that there should be reasonable fee's with regards to this but I also don't agree that they should be withholding 2/3rds of a $2250 deposit for tenants that left the place absolutely spotless.

Don’t withhold rent as them they will have potential grounds for eviction.

Reasonable delays in repairing are okay, though in certain circumstances, they can withhold a few days rent.