If adding a $25,000 dollar rooftop deck to my property would increase its ARV by $40,000, I would do it without a second thought (so to speak of course!) 

Cost of furnishings - luckily in our market the majority of properties come fully turnkey meaning, I write my contracts like so: Personal Property included with the sale, any furniture, décor, lamps, kitchen and household wares, linens, electronics, appliances, all patio and deck furniture, fire pits, hot tubs, rugs, currently located at the residence at no additional value.  

I tried in Houston area and was getting quote from clayton homes for around 110K for 1500-1600 SQFT home (pretty nice looking,3/2 w/ front entry and deck on the back) plus  25k for installation (and beautification) . 

We hired out the new electrical service, wiring, drain drop,and stove pipe replacement, and did the new kitchenette, floor sanding, new deck, and paint ourselves.The Tiny Tipsy Cabin is currently rented on Airbnb with hundreds of reviews and a 4.8 star rating, and net income is about $3,000 a month before accounting for debt service.This one was a fun negotiation to close- it was a MLS deal, with us in second buyer position.

Great deck with a nice gazebo.

Hey everyone! Happy to be in Bigger Pockets!My name is Shelby Hensley, and I've recently become a Houstonian :) Originally from Tampa, FL, my job moved me out here about 2 years ago. Gotta say, I miss home sometimes, ...

I have a great case study in my area in Northern California wine country, there was a manufactured home that was very very nice they built great decks and made a grand entrance it was on 1.5 acres in wine country.

Even looks like you guys had new decking done. 

The inspector missed improper deck flashing and studs missing (not like they weren't installed, they are half gone from rot) in an exposed basement wall and now they're paying a few grand to fix it.

You should pick comps based on the numbers (sq footage, beds, baths, #fireplaces, deck, #garage stalls)Stay within +/- 800 sf. and then adjust for $25 per sq ft difference for any above ground sf.