that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases: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+ (roughly 5% probability of default), 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 (around 10% probability of default), 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.

Include all expenses like property taxes, insurance, maintenance, and property management fees if you’re not managing it yourself.Network Like Crazy: You’ve already made a great first step by joining this group!

It included 25 mobile homes, 60 self-storage units, and four commercial tenants.

I think 1) 10 years that includes recovery from GFC and the Covid pandemic is not a long enough duration2) I think for those 10 years, 100% is not that special3) I think many Midwest markets did not experience the appreciation you depict.There are Midwest markets that have pretty good long term appreciation but there are also many Midwest markets that have appreciation that has not historically kept up with inflation.  

Even when I self manage I include pm because it is work and I do not work for free.

Quote from @Martin Streich: If it is in the middle of the contract term, you either have to terminate it and rewrite a contract, including the other tenant or wait until the contract is done and add the new tenant to the contract on the next lease.

Common deductible expenses include mortgage interest, property management fees, repairs, and even travel expenses related to property management.

I'm wondering how much specifics I need to include for each line item. 

However I have done them in multiple States including Pennsylvania and South Carolina, and what I can say is that it is a tool in your tool belt. when you come across a deal that makes sense to make this type of offer you can do it. the laws in your state make it difficult for you to do these types of deals I suggest either don't do them or pick a virtual market in which you can do these types of deals.

Property Valuation:Investors look at a variety of factors to determine a property’s value, including comparable sales (comps), rental income potential, and location.