What are some generally rules to go by how much to invest in each unit do u guys go by?

Then your expenses, are much more than $2,737.50 for the year.I suggest that you spend some time in the following forum:Landlord and Rental Property Questions.Here is the link:https://www.biggerpockets.com/forums/52-rental-property-questions-landlording-issuesI suggest that you spend some time reading the first 4 "stickies," and the first one that you should read is the "50% rule."

These factors rule far above playing with the numbers and cap rates on which many solely rely.

So, not sure we can assume appreciation getting equity..... eventually....You can justify the buy as an earning asset, cash flow without ever having any equity, plus on the income statement, downside on the balance sheet, would that cause any restrictions on future loans....it could.

: The 50% Rule: How to Quickly Analyze a Multifamily Investment Property

The sale of the home is considered to be for health reasons if the taxpayer's primary reason for selling the home is to obtain medical attention (diagnosis, cure, mitigation, or treatment), or to obtain medical or personal care for a qualified individual suffering from a disease, illness, or injury.Unforeseen circumstances may include: an involuntary conversion (destruction or condemnation of home), unemployment, the inability to pay basic living expenses, or a change in living arrangement such as a divorce or legal separation or multiple births resulting from the same pregnancy, and other reasons to the extent provided in regulationsThe taxpayer's exclusion would have been disallowed because of the "more than one home sold during a 2-year period" rule, except that the taxpayer sold the home due to and of the three reasons listed above.The taxpayer otherwise qualifies for the sale of home exclusion, but there was a period of nonqualified use during which the home was not used as a principal residence (effective for tax years beginning after December 31, 2008).Example: John bought his first home in 2003.

That's why the 50% rule is good.

What I have a problem with is justifying laminates use in kitchens by saying better glues are being used and that its the new owners responsibility to know how not to damage it.

I knew of the like for like rule, but assumed it could be SFH for SFH.

Mortgages have rules, those rules are backed up by regulations, those regulations are covered under laws and violating any rule can result in big problems