honestly, this "rehab" if you can call it that stinks to high heavens. i think your mind is getting clouded with the assumed cash flow amount. i foresee quite a few capex/opex items in your near future. the roof alone is completely unacceptable. they probably had some shingle slappers come out and knock it out in one afternoon. wouldn't be surprised if there are more issues hiding underneath. everything is fixable, but i'd be weary of everything else you cannot see. has your inspector snaked the drains and made sure there are no leaks in water lines?

If all this needs is a snake I would not be getting in person estimates you can get that over the phone.  

Just wanted to know what to expect (snakes, coyotes etc), given how hot it gets during the heat waves in bayarea (Alamaden Valley ) and also in general .

Get in the weekly habit of scanning all your receipts and naming them like this, yyyy-mm-dd <street>_<# addres> (vendor) <reason> $xx.xxSo, for example: 2022-07-16 Main_E_123 (JoePlumber) Snake Drain $125Then you can also enter in accounting software.

I snake the drains between every tenant, cleanout sink traps, put in new toilet guts, gutters should have been clean at handover, etc. 

Purchase price: $20,000 Cash invested: $115 Sale price: $25,000 Contributors: Cindy Carriger This house was owned by an elderly couple who had rented it to an "interesting" family that included one guy on anti-depressants, a Rottweiler, a pit bull, snakes, an iguana, and what looked like asbestos shingles on the exterior walls.

ON THE OTHER END of plumbing is vent pipes, and waste water pipes (mostly black PVC) carrying waist water from building to the city street sewer linesI have heard of landlords having the entire building snaked (roto rootered out the pipes) once a year as a preventative maintenance measure, as many tenants pour grease down kitchen sinks, and wet- wipes (flushable wipes are very hard on plumbing) down toilets causing back up clogs.Most of the leaks on the waist lines are in the p-traps, toilets, clogs in the main drain line and sewer back-ups. 

Total costs need to be below the $125 I would spend just sending the sewer snake down.4.

Having repairs and maintenance done during property ownership is nothing unusual whether it is calling someone to snake the sewer line, have gutters cleaned, or chimneys inspected.

It's likely not cast iron if the house is 34 years old, but make sure you get the pipes snaked with a camera during your inspection, all the way to main sewer line.