Getting hay equipment for the first time.

Looking at getting into baling my own hay instead of hiring it done. Called a local dealer that has a Rancher 665 that looks new with 1500 bales on it for 13k. What do you guys know about these? Was looking for a 5x6 baler as that is what we have always hired out although there were times i measured bales at 5x5.5. the rancher is listed at 61" x 66" so a 5x5.5 how much weight differnce is there compaired to what a 605sm or 568. Will be only baling about 600 bales a year for personal use.
Also he has a pretty clean new holland H7330 which is a 10 foot discmower with flail conditioner for 10k. Will be baling mostly coastal and tiffton 85 bermuda and some ryegrass. Possibly maybe some clovers/legumes in my pecan orchard in early spring.

Should I be looking at a 605sm or 568/569? The rancher baler has both net and twine. Seen a 605sm with 11k bales on it for 11.5k$ with just string would that be a better fit?
Also i have a CaseIH 7110, JD5100e, Kubota m8540 as far as cab

tractors go and a few 75 pto and under uncabed.
Will a 5100e pull both the mower and baler(even a 605sm). Just incase my 7110 is busy doing other work or broke down (hasnt yet).

Also wanted to add, I have never weigheda baleof hay before but compairing to super sacks of pecans that weigh 1500lbs seems we never have bales (5x6) that weigh more than 1500lbs.

Getting hay equipment for the first time.