So PICK the right tenant.TREAT those tenants & the property RIGHT.Consistently enforce ALL elements of the agreement which is of course in writing.Have an attorney to consult with.AS to is it the right time? 

When creating an investment summary, consider including key elements such as property details, financial projections, market analysis, and your investment strategy.

Speculation is always a key element as well, you cannot be afraid to go for the B/C neighborhood when the marketplace such as the bay area, is so volatile. 

Year of update of the systems (roof, plumbing, electric, heat)4. any pets, pools, tranpolines, or business use at any locationThey will usually need more specifics but this is a good start. 

This type of issue can be addressed if the house has independent heating/cooling zones (but a lot of houses don’t have this feature).

Should I put in split air for ac/heat? 

I would go for the #2 scenario as the market is expected to pick up quite a bit this summer when rates should drop and more buyers that have been on the sidelines come back in and heat it back up.

Its good to have a crawlspace vented, but less than ideal in winter time when air is dry anyways and cold because you are trying to heat your house.

Heat will be soon.

Anyways in Dec or Jan , bathroom pipe burst because they never switched on the heating or power, or shut down water - during the coldest winter Seattle has ever seen.