What is good for a realtor is not necessarily good for a home buyer or investor.

I like to work more with listings, but do work with buyers.

I currently don't extra money to invest for that reason, I focus to sell investment rental properties to investors and thru this I will learn and make money than I will start investing myself.I will be dealing with a lot of Foreign CASH buyers that overseas and they will be investing in Miami.

I'd leave it as-is and let the buyer repair it, or have it repaired yourself if it's in the budget.

Take the time to learn how to talk to people, solve problems, analyze a deal, network with investors and cash buyers in your area.

The buyer had 10-14 days to inspect the property with a guarantee of 100% refund pursuant to Florida RE law. 

It's an easy to read book by David Rousher about the basics of MHPs.

When you submit your offer, make sure you have a due diligence period that gives you enough time to do these inspections.Once you get the property under contract, have the septic company do their inspection, have an engineer visit if necessary and get your property inspector out to do a full property inspection -- if he is concerned about a major plumbing issue or mold issue, you can get those specialty trades out to take a look and give you an estimate.If it turns out there is a bunch of extra work in these areas (or ANY areas) that you didn't expect, you go back to the seller and basically say, "Hey, there were hidden defects that I needed to bring in specialty contractors to evaluate, and here are the reports they provided. 

Usually go with non refundable down payment,  some type of monthly credit towards their purchase (only if negotiated ), buyer responsible for all repairs ( assuming home is in good condition when they are buying it) and if they are not able to execute at the end of the lease term offer an extension period with possibly a little more down payment. 

As a first time investment buyer, I just don’t know which is the better investment.