@Connor O'Brien CHA does release payment standards that can be found on their website but those are maximums, not guaranteed. 

Todays standards are far different as you know..

Too bad you can't buy something owner-occupied, put 5% down with the best interest rate, live in it for 12 months (and fix it up), rent it out and repeat the cycle.Here's some other info you might find useful:----------------------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Best way to understand this is research appraisal standards and means. 

(eg, if your lot is not the standard 25 x 125, but some other multiple where the width is actually skinnier than 25, and the lenghth is longer than 125, and you want to reduce side setback requirements, eg.) 

@Serge Hounkponou Recommend you first figure out the property Class you want to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

While technically negotiable, the Sitzer/Burnett case revealed that the industry practice effectively standardized these rates.

Did you use standard offer contract for your jurisdiction? 

They are not a realtor and up to the standards of a realtor.

A 5% of incoming rent for each category is a pretty standard amount to budget.