The plumbing below my sink was improperly done leading to painfully slow drainage (takes days for the final inch of water to leave).

Permits in most locals are required to do any plumbing and electrical, you need to see what is required and what isn't required to have a permit by speaking with the Inspector.

What method do people normally use to rate shop? 

We have received plenty of bookings through these methods, and we're not professional marketers or photographers...we're just documenting and putting our story out there in an authentic way based on the advice from Gary Vee.We have had a lot of photographers reach out to us and ask to stay for free in exchange for pictures or a blog post, but we have turned them all down and no regrets so far.Mike

Mind any potential code violations, deferred maintenance, and your big ticket capex items(re-paving parking lot, loose handrails, amenity repair, roofing, scope plumbing lines, etc)It’s unclear to me if you’re buying this with your money or other peoples money.

Her method I would say is great for flippers that want to make correct offers.

The wiring and plumbing are two area's that may need updating.

My partner and I are exploring the concept of stealing the idea of raising capital for syndications and such and using it for our smaller scale residential investments, gaining some experience in how that works, what it looks like to raise capital, and just adding to our experience and track record.Now, while offsetting DTI is great, there comes a point in which it just makes sense to use other people's money and capabilities they have in methods such as equity money partnerships.

Does anyone have any methods, sites, resources, tricks etc. for this?

There are tax engineering companies that can do advanced cost segs for interior electrical and plumbing.