After analyzing the potential ROI, we negotiated a fair price of $58,500, ensuring room for renovation costs and profit.

Prices are through the roof, Insurance cost have skyrocketed, maintenance cost are up a lot, taxes.

No but keep track of those repairs as it will add to your cost basis when you go to sell it and have to pay capital gains.

. - Value add - How much does it cost to build additional storage units? 

I have a large lump sum saved in an investment account for down-payment and any additional costs.

I carried double the cost on Gas and Electricity to be safe. ==== Projected Income ====**Off Season**-$4,000/Month Rent Period: September - May (7 Months) Projected Income: $28,000**Summer 1**-$8,000/Week Rent Period: June (4 Weeks)Projected Income: $32,000**Summer 2**-$8,500/WeekRent Period: July-September (12 Weeks) Projected Income: $102,000**Optional** (Basement Apartment)-$2,000/Month -Rent Period: Year Round Projected Income: $24,000TOTAL PROJECTED INCOME: $186,000 ==== Operating Cost ====-Mortgage: $84,000 ($7,000/Month) -Utilities: $36,200Gas $6,000 ($500/Month) Electricity $6,000 ($500/Month) Internet $2,400 ($200/Month) Garbage $5,000 (Estimate) Pool $4,000 ($250/Week)Landscaping: $4,000 -Mowing: $2,400 ($150/Week)  -Clean Ups: $1,600 (Spring & Fall)-Weekly Turnovers: $8,800 ($550/Week)==== Legal Cost ====Summer Rental Fee: $20,100 (15% of $134K)Sandwich Rental Tax: $6,855 (15% of $45,700) NET PROFFIT: $38,845.00

.$24K in soft costs (permits impact fees etc)$200K (or less) buildout of the house (size tbd on after-build-appraisal) Likely going with 2/2 A frame 1000 sf.

Cost used is $25,000. 

Can you give a cost breakdown?  

Lastly and before you think I am going to sell you a training program that cost thousands of dollars.