What should it cost?

I own property and do interior design for rental and investment properties so I stay up to date from my clients and local events I attend through RE associations and meetups which I recommend.

Best time to get a heloc is when you do not need the heloc! 

It's a range and depends on the property type, location, end condition and rental strategy. 

.: I just hired an architect to design and plans submit for ADU in my 8 multi unit to use the tuck under parking.Some people say do not try to be the general contractor as it will take way more time, costly mistakes and will be nearly impossible to manage with current work. best to hire a company that will do it all and cost about $250 per square foot.

It's growing like crazy!

The best advice I can give you for studying for you license is to voice record yourself reading questions and answers on notes cards.

Pay the bill yourself, then reimburse yourself by charging the tenants based on a formula.

Of course don't go there just looking for business, you go because you believe in whatever the group is doing. 

If you don’t, you could find yourself in financial trouble.Thanx Mitch.