Leveraging Graham's local market expertise, we secured the property for $162,500.

Withhold the amount from their security deposit if allowed.6.

I have some thoughts to your question:1) Maintenance service plans (requires agreement with preferred vendor, or if you have maintenance staff, through your company)2) Landlord liability insurance through third-party insurance providers (note: this is in addition to a Dwelling Policy, which the owner should already have)3) Lawn maintenance service programs (requires agreement with a vendor for agreed-upon pricing, or if you have lawn staff to provide this service, through your company)4) Fee in lieu of security deposit (requires agreement with insurance company that provides this service)5) Increased inspection options (e.g.

Your enforcement remedies under law are: 1) deliver a notice to pay per F.S. 83.56(3), 2) make a claim on the security deposit when they vacate per F.S. 83.49, and 3) seek collection of unpaid rent through lawsuit or collection company. 

My partner are thinking to buy it first and THEN bring in the developer, but securing it ourselves first...Just trying to figure out the best logistics of all this...

Brining someone in for that 10% gap is likely better as a partnership or equity split as there's not a lot of security in lending on a 100% leveraged fixer. 

The lease agreement clearly states that the "Security Deposit", and not "Damage Deposit", does not have to be returned to the tenant if all the terms of the agreement are not met.

While there are returns and security in substantial positive cashflow, you also get returns through appreciation, tax deductions, and loan paydown.

Inspector required me to place full house fire alarm even though I was not doing anything related to it.  

It's always better to go off a referral with a proven track record rather than a random number from a Google search.One caveat to consider is that without owning prior real estate or a primary residence, securing long-term financing might be more challenging.