What leads to the highest repair cost? 

Okay, let's allocate $1500-$2,000 for this repair that will need to be done.  

Since the price of a multi unit is double or sometimes 3x the price of a single family home, would it be smart to start off with a SFH and scale up from there or just make the leap into a duplex that I can force some appreciation with minor repairs.

Quote from @Alecia Loveless: @Natalia Perlova Absolutly no to the Sunday repair.

That’s correct, a foreigner can buy property through a Mexican corporation, which is a great option for those investing in multiple properties or running a rental business.Key Points I'd like to add to your post:Setup Costs: $1,500–$3,000 USD.Ongoing Costs: $1,000–$2,000 USD/year for accounting and tax filings.Benefits: Allows tax deductions for expenses like maintenance, repairs, and management.Best for: Multiple properties or income-generating investments.For a single property for personal use, a fideicomiso is often simpler and more cost-effective due to its lower maintenance requirements and feesUltimately, choosing between a corporation and a fideicomiso comes down to your investment strategy.

Additionally, have a clear budget, factoring in potential repair costs, and ensure you understand the rules about earnest money deposits and closing deadlines.LLC for Real Estate Investing: Forming an LLC for rental properties can offer liability protection and may provide tax advantages, though the tax benefits are non-existence for rentals.

Various repair issues, bad tenant, and now this issue.

As an example I was looking at a multi unit, smaller building and within 90 seconds of viewing the proforma I saw the maintenance/repair figures were "low".

Rough calculations on what I need to be looking for:90k deal (purchase and renovations to get max rent)20% down = 18k from me80% bank loan at 8%, 20 yr amortization = 72k-------------------------------------------------- Here's my DSCR calculation:Calculate Net Operating Income (NOI):Monthly rent: $125040% expense ratio (taxes, insurance, repairs, vacancy) = $480NOI: $1250 - $500 = $750Calculate Monthly Mortgage Payment:Loan Amount: $75,000Interest Rate: 8% per year (0.08/12 = 0.006667 monthly)Loan Term: 20 years (20 * 12 = 240 months)Monthly Payment ≈ $627.83Calculate DSCR:DSCR = NOI / Monthly Mortgage PaymentDSCR = $750 / $627.83DSCR ≈ 1.20Therefore, with a $75,000 mortgage at 8% interest over 20 years, the DSCR is approximately 1.20

Let’s break it down with the 70% rule to see if it’s investor-friendly:ARV: $190,000 (taking the middle of $180K-$200K)70% of ARV: $190,000 * 0.7 = $133,000Minus Estimated Repairs:Roof: $20,000AC: $4,000Additional repairs (general estimate for a property needing updates, say flooring, paint, minor plumbing): $10,000-$15,000Total Repairs: approx. $35,000Max Buy Price for Investor: $133,000 - $35,000 - $10,000 (wholesale fee) = $88,000Since you’re getting it for $91,000, you’re close, but to make it irresistible, consider negotiating the purchase price down a bit further.