First off these are not even in the realm of like investments. Second If you want all things calculated for expenses on anything possible for FedEx routes you need to add a lot for real estate in terms of property taxes, maintenance, HOA, bad tenants or evictions, and lost rents for move outs.
You can make decent money in the FedEx game, you can lose a lot in the FedEx game, you will have a lot of stress more than likely. When it runs good there are few things better, when it runs bad there are few things worse. I tripled my investment in 3 years with my routes because of leveraged money (little more than doubled from the sale price that I paid to what I sold for, after accounting for debt takeover from new trucks). If you are in the right areas you can make a lot of money but it probably won't be easy and don't run it absentee.
Also I am on the other side of the table in regards to new or old trucks. I had some very piss poor manual tranny internationals that cost me a fortune to keep up on. I was making the most after I brought in 3 brand new 1200s even accounting for over $3k a month for the payments compared to keeping the 1998, 2000, and 2 2001s going