I planning to have backyard installed in new construction SFH.I read this cannot be added to the cost basis of the rental property and be depreciated by 27.5 years since it is not an improvement to the property.But what about paving the patio and side of the garage, where it is touching the house.   

Tenants tend to stay longer in single families which leads to less vacancy and turnover cost. 

Rolling in repair costs is also achievable in both government and conventional financing. 

Minutes away from Sanibel Island.Main house is a 3b/2ba renting for $2600Duplex on same lot is 4b/2ba split into two 2b/1ba collecting $1900 in rent EACH.Purchase price of home was $662,000 with closing costs wrapped in.

What if it costs 20% to sell?

These loans are structured with a combination of a first mortgage from a conventional lender (typically covering 50% of the project costs), a second mortgage from a Certified Development Company (CDC) backed by the SBA (covering 40% of the costs), and a down payment from the borrower (typically 10%).Bridge Loans: Bridge loans are short-term financing solutions used to "bridge" the gap between the purchase of a new property and the sale of an existing property or the availability of permanent financing.

.- Low operational cost- Good seasonality markets- Should be easier to operationalize service via property managers remotely.What are some of the strategies that have worked?

If you are looking to rehab, it is more efficient and cost-effective to rehab all units at the same time. 

Looking out for suggestions @Kaushik SarkarIf the equity in your properties is your only source for new investing, and the new property you are buying still cash-flow's with the cost of your borrowed money (from your properties), there is no reason to not use it as an investment vehicle.  

I got an appraisal prior to starting and my numbers looks like this PP: 137kClosing costs:5kRenovation: 230kprojected holding costs: 26kARV: 620-650KEstimated rents: conservatively--> $4400/month.