I've searched extensively on this, so if you know of a good post where this is addressed, please link, I'm not coming up with anything.

For instance I have multiple 3br/2ba homes in the same area, but some have a garage so I add typically an extra $75 to that rental and others have a finished basement so I might add $50 to those monthly rentals.   2.  2-3 hrs might be a lot to manage yourself.  

They tend to have general info and knowledge of various asset classes but do not specialize.Those nuances and deep expert level knowledge from a specialist makes all the difference in the world when you are buying a property in the millions to tens of million of dollars in purchase price.For instance in retail commercial I have specific commercial attorneys I use that have specialized skills like I do in a specific asset class.Hope it helps.

No notice, no confirmation from us, they said the original lease allowed for this extension and they did it.My question is, do I even worry about this?

BiggerPockets is so extensive...but I love it.

The home we bought was extended and contains an extension that brings in an extra 600/mo, which we recently started saving in its entirety.

I was looking at Lima One Capital, for instance, and their rates seem to be reasonable (at least on the website) compared to some of the others I have found. 

The size of the development deal matters as well.If for instance it is a 3 million dollar deal with 1 million of upside after resale cost then at 50% the sponsor gets only 500,000.If it's say a value add property and not development where the property is 50 million at 50% occupancy and then worth 80 million after stabilized then at say 28 million profit after expenses at 30% to sponsor is 8,400,000.

Ive seen plenty of instances when $5k premium isnt enough to get the deal done though. 

I can tell from my extensive experience that using a mentor/coach who is vetted and is in the space will lead to a person's success much quicker.