Does anyone know if it's possible to transfer a property from an individual (myself) to an LLC with other members (myself + my partner) when the mortgage is only under my name?

No opportunities for the individual members to go their own way without some additional moving parts.There are a couple of ways to deal with the LLC including dissolving the LLC after the 1031 is complete and distributing the property to the former members. 

If your friend has 100+ apartments and his turnover rate is 50% or less then all he's paying is the monthly management fee for the remainder of his units. 3rd mistake- You have not considered the value of your individual time.

Then she states that individuals want a detailed report of these builds, this should of been asked in the beginning stages.

Wanting to network with individuals and mastermind to get the juices flowing!

If you would like this data, let me know and I will post it.The number of skills and knowledge required to find such properties, renovate them, and monetize them is more than any individual can do.

Can I put myself in unknown scenarios and grow as an individual on a daily basis?

Should the Co-GP participate as an LLC or Individual? 

There's debate about this but personally, I think buying in an LLC makes more sense for liability reasons IF you plan on buying more than just one and UNLESS you plan on getting financing from either FHA (you have to live in a unit, but can buy up to a fourplex) or one of the 10 Fannie Mae investments loans individuals can get that have to be in their name.

Either rent out the rooms individually, buy a duplex, triplex, or fourplex, or a house with a mother-in-law.