Like I said: lots of overlap, but also lots of differences.  

Another huge thing coming up is Philadelphia is about to switch from the 2009 IBC to the 2018 IBC and 2015 IRC (we're in a dual-code overlap for another couple months).In the 2009 code, if you were able to meet your maximum travel distance, you could have a roof deck (4th floor) that exited out the 3rd floor of the unit it served and get away with a single means of egress.

HomeAway/VRBO seems to be older groups and longer bookings (more than 2 nights which is our minimum) AirBNB seems to be younger and usually weekends (2 nights) but there is for sure some overlap. 

He said that the surround overlaps the tub flange, so caulk is not needed.What say you?

There may be areas of overlap, synergy, and mutual benefits.Consider looking beyond rent (which should be increased IMO) to find additional opportunities to increase your bottom line.

Schedule appointments to slightly overlap to show there's demand.

However, even in that situation, chances are there will still be opportunities that do not overlap, and more opportunities farther away.

Go to both as they have different topics and not a ton of overlap in attendance.  

Although some over lap is great so you can show tenants multiple houses.

The lender will have some overlap requirements, but it is enabling me to refi my house where as I couldn't quite make it happen a month ago.