A: Either the seller or the buyer can prepare a purchase agreement. Like any contract, it can be a standard document that one party uses in the normal course of business or it can be the end result of back-and-forth negotiations.
Most often, the buyer's real estate agent will write up and prepare the purchase agreement for a house. Note that agents (not being practicing attorneys themselves) can't create their own contracts.
In Florida commonly the parties utilize the Florida Realtors/FloridaBar-ASIS-6 Rev. 10/21/2021. That is an example of a approved form.
A: A Quitclaim Deed is a form of title transfer as is a Warranty Deed and a Special Warranty Deed.
Quitclaim Deed – provides the grantee with the least protection; it contains no promises or warranties, and only conveys whatever title and interest the grantor has. A quitclaim deed makes no assurance that the grantor actually has an ownership interest in a property; it merely states that if the grantor does, they release those ownership rights. Quitclaim deeds are typically used to transfer property in non-sale situations, such as transfers of property between family members.
Warranty Deed - makes a promise to the buyer that the seller has good title to the property. A quitclaim deed, on the other hand, makes no promises.
A: The first question I would ask, is the nature of the dispute. Is it actionable? Does the person who sent the demand letter have any legal right to bring a lawsuit against you?
Typically costs associated with a lawsuit are the filing fee and service of process/summons and possibly free judgment interest, depending on the alleged violation, if it is monetary.
A: Having already signed a lease agreement. Your options are somewhat limited. Residential leases are for the most part governed by Florida Statutes. There is no specific answer to your question, because it depends on the nature of the dispute.