Which is more rent reliable, best growing, both for cash flow and long term appreciation?

If you're selling to flipper and the contractor isn't part of that, not sure it will be possible to get a reliable person. 

If you're seeking a reliable income stream, consider checking out Cleveland OH.

I have seen quite a few CRE platforms (Loopnet, Reonomy, Crexi etc.) and all have horrible ratings with the Better Business Bureau.What does everyone here use as a reliable source of info to prospect and be able to do due diligence?

In addition to the workmanship, you want to work with someone who is good at managing time, people and his relationship with you, his client :-)    We are actually building out a network of approved contractors because one of the biggest pain points investors and landlords face in Philly is finding reliable solutions. 

A quality local RE Broker/Agent in tandem with a reliable contractors should be able to help you with full analysis of post rehab value.

Hire a Reliable Real Estate Agent (you!)

Hiring a Manager: Decide whether you'll manage the property yourself or hire a property management company.Tenant Screening: Develop a tenant screening process to find reliable renters who meet your criteria.Legal and Tax Considerations:Legal Structure: Consider forming an LLC or another legal entity to protect your personal assets.Tax Implications: Understand tax deductions available for rental properties, including mortgage interest, property taxes, and depreciation.Networking and Education:Real Estate Forums: Participate in forums like this one to learn from experienced investors and ask questions.Local Real Estate Groups: Join local investor meetups or associations to network with professionals in your area.Continued Learning: Attend seminars, webinars, or workshops to stay informed about real estate investing strategies and market updates.Starting with a rental property while keeping your condo as an investment is a great way to begin building wealth through real estate.

Are they ususally reliable?

It's important to thoroughly vet potential tenants to ensure that they are reliable and will take good care of your property.