These are common scenarios that could ruin him financially. 

Needless to say, my credit score has dropped beyond a reasonable number for finance, and has, as far as I know, ruined any chance of me advancing my real estate journey any time soon.I have a very stable job bringing in $76,000/year.

We want as little drama as possible after we sign the lease and this includes gang activity in the building.I would not be offended by the ink so long as it was not intended to be offensive.I like that so lets NOT defund our police  .. thats a  great service.. a couple gang bangers can ruin a property. 

Renters are facing their own financial ruin and possible homelessness, and we are the ones who basically will be forced to eventually kick them out.

Because of this, GTA and GVA are out of question due to the 15% oversea buyer speculation tax. ( the tax ruins the leverage and return )- Have about 150K CAD for downpayment.

I have been looking for a single family house hack but it has been difficult, houses are going 50K over asking which ruins my numbers2.

I'm very disappointed that some ruin it for so many, investors, sellers, buyers and yes, brokers as well because they lose business and can't assist their clients in the best possible way, which is what it's all about.  

One turnover will cost you thousands and ruin years of "cashflow". 

I brought that up to a broker, and he cautioned me not to turn in many extremely unpriced offers for my clients, or else I may ruin my name.

Well it may occasionally but most of the time it ruins your credibility and any chances of coming to a successful close.Know the market by asking the questions up above and driving and surveying every property that has sold in the last 12 months, pending, active, expired and canceled.