You are just framing in and putting in insulation (if ) and drywall and mudding and texture+ paint to match. 

Also "his driveway" is all on my property, he just has a easement to access it and complains if dirt or mud gets on it.

Dug wells are similar to drinking out of a mud puddle, and E. coli can come from any animal in the area (mice, etc).

How do BC landlords ever get rid of undesirable tenants if they're still paying rent on time?

I have a tenant who just moved in and upon entering the unit a few days later to hang a shower curtain rod (Shower stall so the curtain is 90 degrees I didn’t feel comfortable with them anchoring it to the wall) I walked into the mud room and was hit with a very strong marijuana smell.

Renovate, evict undesirable tenants, and fill with better tenants.This works if you know what you are doing. 

It is much easier to find 1% properties in rough areas (undesirable to most people): Del Paso Heights, parts of South Sacramento, parts of Oak Park.Basically, you should see what areas you're comfortable living in, what kind of cash flow that can provide and think about if you are happy with those numbers.  

Clear as mud?

It needs a new roof $7,000, electrical $3,500 a unit, plumbing $3,000 a unit, refinish hardwood floors $3,500 a unit, privacy fence $1,500, landscaping $750.00, interior mud work and painting $5,500 per unit, 4 new doors units and possibly 5to8 new windows maybe $5,000.   

If both are over $100k use the lesser of $100k or 10% of the lesser of income or net worthClear as mud?