These areas tend to attract high-quality tenants and provide consistent passive income, which is a great foundation for building your portfolio.If you’d like, I’d be happy to share some insights about these types of markets and why they’re appealing to investors.

@Chris Kay finding a quality, cost-effective contractor is extremely difficult:(There are thousands of contractors that are great talkers, but rarely perform within budget.Standard bait & switch is to lowball a bid, then once they get started all sorts of things "pop up" that somehow their bid didn't cover.

https://www.biggerpockets.com/forums/12/topics/1122318-quality-turnkey-companies?

I know this is an unpopular opinion around here that you won’t see on the front page of the daily BiggerPockets newsletter, but it’s the truth For the record, I still believe a quality STR purchase offers a great ROI over the long term.  

@Jemini LeckieRecommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

We stick to high quality neighborhoods and homes and are doing really well with it.

Sounds to me like you’re commenting on how the quality of the course is without having seen it.  

Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

The success of your cold call (or any marketing) campaign depends on  the quality  of  data (leads)  that you are using.

My clients can "force appreciate" the value of the property by doing a quality rehab for a lower than market cost because they are very good at spotting "diamonds in the rough".