I also recommend you do your own dental work.Which of these makes sense?

No paper towels, no "flushable wipes", no dental floss, no hygiene products, no tee shirts (real example). 

The example that comes to mind are often are of folks that operated a dental practice, an accounting office, a bankruptcy lawyer and her staff that did quite well in the 2008 aftermath, and so on, during those first few years, taking up a portion of or all of the space.Once you realize what a dumpster fire it is finding good financing for offices, if you need it, I'll be available. 

What other ways can you instruct the tenant to keep better hygiene?

We were thinking UM or the med/dental/eye students might be a better area.

I dropped out of dental school (when I realized I wasn't making money fast enough) after being accepted with a 4.0 gpa in undergrad... many of the courses which I have taken are firmly rooted in chemistry...

My question is, what if the tenant(s) does not have a good hygiene hobbit and results a pest infected property, would LLs still be responsible for this type of issues?

Reject them because of their hygiene, or because you were unsatisfied with their references, or they smoke.

Some docs pull 500k into over 1 million a year for some surgeons.They do not need the money today and are looking for high quality assets with minimum yield and safer.Something like a Starbucks, T-mobile, and Aspen Dental 3 top at 6.5 to 6.75 cap and 4 million with 1 million down etc. is a flavor they tend to like to buy. 

For example an Aspen Dental, T-Mobile, and a Starbucks 3 tenant center at around 3 million for 30% down is 900,000.