I did a MASHVISOR demo the other day and of course it all looks very impressive but I have not tried using it in the real world, so I am glad to get these insights from all of you. 

I would be more than happy to do grunt work, demo, and the countless Home Depot trips that are needed very inexpensively with an addition of some hands on training along the way.

All that happens when you never actually saw the deed ..so you are not an owner ..and you cannot do anything..because you are not a party to the case even though your money is kept in escrow by judicial sale. you can hire an attorney and get added to the case ...I call it opening can of worms ..7.City of Chicago demo court.

Started demoing the floor, the person before used an epoxy set, it was not coming up!

For really high end finishes and upgrades, count on $300 per sq. ft.So, if you are talking mid level higher end homes in CA and just the interior (no windows, stucco, roof, foundation,  landscaping, etc) then the price is under those figures.In my Beverly Hills flip, it is just over 3000 sq. ft. and the interior portion of the rehab (demo, architectural design, engineering, rough framing - added load bearing beams, moved load bearing walls, low voltage wiring, rough electrical and plumbing (some existing is used) or repositioned), finish electrical and plumbing, flooring (wood) plus tile in bathrooms and kitchen, new interior solid core doors and hardware, drywall (about 40%- 50% of existing was used), paint, custom cabinetry with custom stain, cabinet hardware, kitchen appliances - Viking) all of this will run me about $250k or just over $80 per sq. ft. not including any permit fees or project manager fees.Now, I am also doing new windows and exterior doors and sliders, roof, landscaping, decking, BBQ buildout, etc. and my total budget is $350k ($113 per sq. ft.) 

As for value, I would put the value of the property as ARV minus permit + demo cost unless in a community like Palm Springs where a pool is almost considered a necessity.

I would rather be the one to do the "small" things like pulling up carpet to save the demo per sq ft cost.

Looking for contractor / labor for several projects: carpentry, painting, demo, minor plumbing in the Gardiner Maine area.

I know investor carrot does demos and realeflow is offering a $1 trial so see which you like better.

Get a demo permit.