But I’m looking for solid resources or websites where I can independently research and estimate:Water / sewer (Philadelphia Water Dept. estimates?)

You can find both on marketplaces like Zillow, Realtor.com, Trulia, and other platforms.If you work with a turnkey provider or know of any small homebuilders, you can go to their websites to see what new construction inventory they have available.

The only option might be if you actively market the direct booking website or airbnb listing on Facebook etc, and record your time.

I am curious if any of the people listed on his website are familiar with him putting them on the website. 

Second, their website does not mention a single thing about COMPLETED projects.  

This is actually my first day on Biggerpockets website.

That forced us to look hard at our internal operations.We started leaning more into tech, not because it sounds good on a website, but because inefficiency was quietly eating margin.A few changes that actually made a difference:1.

Business Cards "A" Frame Signs Non Owner Occupieds Paper Signs on Poles Join Community Organizations Hire a Sign "Flipper" Bandit Signs Church Small Groups Hard Money Lenders Door Hangers Sponsor An Event Developer and Builders Hand Outs Charitable Donations Mailmen Flyers Charitable Raffles Your Competitors Title Companies Host or Co-Host a Charitable Function Local Employers Closing Agents Hold a Free "How To" Seminar Rent to Own Stores C.P.A.s Booth at the Home Show Referrals Attorneys Fliers to Weekly Hotels Your Existing Occupants Property Managers Put Up Signs on Your Properties Have Your Voice Message Urge Caller to "Tell a Friend" Financial Planners Ads for Other Properties Free Publicity Financial Advisors Join the BBB Sponsor A "Food Truck" with Your Promo Info Insurance Salesmen Bankruptcy Filings Pay for an Ad on an Ice Cream Truck Investors Court Filings Write Articles for Papers Your Contractors Probate Interviews for Radio, TV, Newspapers Your vendors New Baby Announcements University Bulletin Boards Door To Door Mail to Landlords List on Fizber.com Free Gift Offer Signs at the Gate to an Army Fort Weekly or Community Newspaper Ads Apartment Complexes Signs at the Gate to a Sub Division Bulletin Boards At Safeway/Albertsons/Krogers Mailers Hire a Student To Hand Out Fliers Minor Newspaper Ads FSBO.com Promo Material - Calendars, Notepads Newspaper Weekend Ads Magnet Signs for Your Cars Co-operative Advertising Real Estate Magazines Flying Banners Craigslist FSBO Magazines Trade Shows Website FSBO Signs in Yards Festivals Bus Stop Signs Restaurants Fairs Adopt a Street Sign Restrooms Balloons Laundromats Mail Centers Movie Theater Commercials Car Washes Billboards Rent a McDonald's Sign Auto Shops T-Shirts and Hats E-Mail Blasts Google Ads Twitter Radio Ads Expired MLS Listings Sponsor a Sports Team Free Information Report Open Houses Real Estate Agents Probates Pre-foreclosures Loan Officers

You would need to look at buying full architectural plans from a website, as you likely can't afford to design from scratch. 

I recently started using DoorLoop to manage the 87 doors in my property management firm, which are owned by 16 different owners.The website and features feel unnecessarily complicated, despite the attractive interface.