I love the concept especially given the need in your market for storing things like snow machines, boats, rvs etc, but also for repair or general "fab shops".As long as you are seeing the demand in your specific market for these spaces, and perhaps its worth getting some leases signed up prior to breaking ground but thats a personal preference thing, I think the numbers look promising if the use case is there.

The landlord or his agent shall notify the tenant within 30 days after the beginning of the lease term of the name and address of the bank or institution where his deposit is currently located or the name of the insurance company providing the bond

1 year lease for an apartment to a single woman with a dog in Duluth, GA. 

Rpdata.com.au is probably the best for residential dataAny of the major agencies CBRE/JLL/Knight Frank/Savills/Mirvac will have reportsPlus a lot of the publicly listed REITs will have reports too ie DEXUS/Investa/Lend Lease/Westfield/Stockland/Cromwell etc.

Another lesson I’ve learned is that buying a single family home as my primary residence to later lease to a tenant is a bad strategy unless I’m purchasing the property at a really low price.

This was a few years ago, but at that time as I recall they were looking to do more long-term property leases over owning properties and doing pretty landlord friendly leases where they would do repairs and even pay property taxes. 

Sometimes pulling out equity and reinvesting it elsewhere..maybe in a smaller, more agile asset..can give you the cash flow boost you’re after without giving up a solid property.Improving the property’s current performance by making it more appealing to tenants or tweaking lease structures could give you a nice bump.

If you actually have a triplex rather than a duplex that could impact insurance eligibility and pricing but it doesn't sound like that's the case.Along those lines, you just have to make sure sub-leasing is OK with your insurance.

@William Burns we've managed thousands of S8 leases in our 24 years in business.The DHC has the most challenges, but it's NOT all their fault. 

Review all leases.