For example, a sandwich lease carries some of the same risks that any landlord faces, what I call the tenants and toilets issues. 

You even said this post is a hypothecal example. 

For example, how much has the market gone up since 2019 for my area?

What are the typical challenges after you close on a new purchase?

For example, if rates drop below 6% many more buyers will enter the market putting more pressure on demand and raising prices while owners with 3% ish rates won't sell until rates go to at or below 5%.

Also don't forgot there is tax on capital gain for over $500,000 when house is sold, andclosing costs typical goes around 5%-6%.So unless home appreciates A LOT, it doesn't seem to make sense to own a property as long as you are paying mortgage with interest, unless one can pay it all back in much shorter term (10 years or less).

For this example we will use 70% For this formula you will need to know the following:ARV=After Repair Value ( How much will the house will sell for after making all the repairs needed)Repair Estimate - (Send me a message and I can send you a list I got from my mentorship class for ball park estimates based on square footage and depending if you need cosmetic repairs, avarage repairs or Extreme repairs)Your Assigment FeeARVx.70 - Repairs - Your Assignment FEE = Max OfferExample$200,000 x .70 = $140,000 - $30,000 (repairs) - $10,000 (your profit) = $100,000 (offer)Your potential profit is $10,000 I hope this formula helps you make offers that will make sense for all involved in the transaction.Happy Wholesaling,Lily Rodriguez - Investor friendly Broker

Are DSCR loans typically based on LTV of ARV or purchase price?

Only time this doesn't apply is typically if its a court appointed sale and the judge is deciding that what nets the most cash is what's best for all involved, or a similar scenario. 

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+, zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680, some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.