Setting up a seller finance purchase & private money reno loan

[Melissa Dinas]

Let's say I'm purchasing a home at $198k that needs $60k in rehab. Resale value is $360k. The owner is willing to seller finance at 3% for 5 years, amortized over 30. 

Does the above scenario mean that I would be making monthly payments (to the homeowner) of $834.78 for 60 months plus pay a principal balance of $176,034.60 at the 60th month? 

Let's also say I'm getting a private money loan for the $60k for the reno. The interest rate is 4% for 18 months. No payments expected until month 18.

Does that make my total payback (to the lender) $61,917.91 at month 18?

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It's 6 months later and I'm ready to lease option to a new buyer. My sale price is $360k. The down payment is $5k with a monthly payment of $2500, 12 month term. 

My monthly outlay is $375 (vac/repairs/capex) + $834.78 (payment to original homeowner) = $1,209.78

Income: $2,500

Yearly cashflow: $5k (down payment) + $30k (monthly payments) = $35k

Sale: $360k + $35K (sale + yearly cashflow) - $14,517.36 (my outgoing for 12 months) - $226,121.40 (total paid to original homeowner) - $61,917.91 (repayment of reno loan) = $92,443.33 (my profit)

Are my numbers correct? Thanks for any help!