Approx 1/3 of our assets are in rentals, so an advisor that is also a real estate investor themselves is preferred. 

Use the upgrades however do not expect shingles of any quality to realistically last 35/40 years. 25 year shingles will safely last 15 years depending on the climate, attic ventilation, direction roof is facing etc. 40 year might last 25 but that may be a stretch.Metal would be preferred longevity wise however cost prohibitive for a rental.

I have multiple section 8 tenants at any given time and prefer it that way.

I was debating if I should put a SS appliance package in but the realtor thought it would be okay for buyer to 'imagine' their own preferred brands and such.

But I started my journey with a realtor who's name I found here on BP, a PM I found on Roofstock (one of their "preferred" PM's), and an inspector I found online that had excellent reviews.

I know there are companies who do both but we have found our niche in long-term residential and that is where our expertise is.

Since you're remodeling anyway I'd get a price to run the vent outside and do that if possible unless this is like a C or D property and you're trying hard for low, Section 8 compatible rents.I prefer them ran outside.With that said, no one has ever complained about ductless vents to me.  

How has technology shaped and influenced marketing to this niche?

I prefer the brrr strategy as well and is primarily what I do. 

I prefer to stay in Birm and other areas.