Should I offer to pay them for their consultation, or are these types of questions common as part of the PM vetting process and is a "courtesy service"?

Some employers, (when you're 50+) 401k adoption agreements will allow you to do an "in-service-rollover". 

Its a per-service fee. 

Quote from @Zhongyuan Luo: Hi there, I have a general question as I’m considering going pro with the service.

The website 51west.properties also scores low on scam advisor ("owner is using a service to hide their identity, high number of suspicious websites on the server, registrar has a high % of spammers and fraud sites, website is (very) young, website appears to be hosted by a company with a bad reputation", all according to https://www.scamadviser.com/check-website/51west.properties...)Trust your instincts. 

Used a HELOC on a primary, and was sure that even with that additional debt-service, there was + cash flow.

There is an app but it’s quite rudimentary so if you need anything detailed it’s better to just use the web version.

Used a HELOC on a primary, and was sure that even with that additional debt-service, there was + cash flow.

However, the escrow servicer reneged on the options at the last moment and decided they would only reimburse a HELOC.

But by putting the properties into the business name you can avoid having the debt reported to personal credit so long as the funding lenders servicing company allows for it.