I say this because they are always going to do the easiest thing which is say it needs replacement.   

Utilize the enemy method - like @Bradley Buxton said, take a look at your competition to see how yours compares and make adjustments accordingly

Nor does this method apply to buy and holds, MFHs, MHPS, or anything else unrelated.

What’s the best strategy to do so, and what platforms are the best and easiest to use.

Over the past three years, I've been using most of the major off-market techniques.A classic method is pulling data and feeding it into a call center to generate off-market leads.

Over the past three years, I’ve been using most of the major off-market techniques.One standout method has always been pulling data and feeding it into a call center to generate off-market leads.

If there are other or better methods to consider, please let me know!

None of the methods you purposed are bad, just gotta commit and run it for 5-10 years at a time.

It's not uncommon for Class A rentals to negative cashflow for the first 3-5 years, until rents increase at a higher rate than taxes & insurance increase.While this can be an unpleasant situation, Class A properties tend to appreciate the most and attract the best/easiest tenants.

If you are interested in finding off market properties I can show you a few of my methods.