Many of these types of companies do use SIPs or a similar highly insulated panel. 

Over the time that we owned it, we painted the entire interior, put new carpet on the bottom floor, replaced the entire kitchen, new electrical panel, put in new light fixtures in bedrooms and kitchen and glazed the tubs white.

I would have moved in right away to live in while we fixed it up (decent condition paint, flooring) but we have a baby and we got a homestyle mortgage rehab loan and are spending 70k putting in solid hardwood floors throughout (was carpet or vinyl sheets), painting grey (was yellow/beige), new hvac system, (furnace worked but ac needed repair, both systems 15 years old), new hot water heater, new trendy white kitchen (15k with granite) with wood look tile, new electrical panel, etc.

Is the panel updated and is it adequate for the necessary wiring?

Dear Everyone,I am planning to put Solar panels for a rental house in San Jose, California.

Since I have already had the ADU built, do i need a separate permit to install a panel?

4) Electrical - Main Panel size/number of breaker slots/wire size/grounded?

Check out your utility panel to see if it's new or has to be replaced.

Again all stud-framing completed throughout, a finished basement, nd all electrical is roughed in, including an upgrade to new 200 amp panel. asking only 199k.so-called 3 cash buyers stood me up, this weekend made me look crazy.trying to get quality buyers and advice on working out the details, what would any knowledgeable member do if these were your deals?

Sure a 60 amp panel is small by today's standards but do you really need to spend $25K to address it?