If you want a backhoe you should buy one.
On how you buy one, a new tractor is always a good idea. The B2620 is a 26HP machine i think? So it's not that valuable, as all 26HP machines have no emissions controls - a L2501 has no emissions, a B2650 has no emissions.
Having said that, as someone who bought a BX2350 then added a loader, I can say that adding to an existing machine is a mistake. It would have been substantially more cost effective (taking resale into account) to have bought a machine with a loader. I now have a 15 year old machine with a 3 year old loader - effectively the loader is worth the same as a 15 year old loader, as nobody cares that it's new.
There's nothing wrong with a Woods backhoe as such, but the Kubota ones are better. I'd take a careful look at whether you can get a machine with original equipment backhoe (even if new with finance). I think long term you'll appreciate it. I think Messicks has a video on it - my recollection is most after market backhoes (I presume including the Woods) mount to the 3ph, and stick out further than the Kubota ones that are mounted to the chassis. That impacts your departure angle - when you drive up ramps (onto a trailer, or otherwise) the backhoe digs into the ground. I think there are other limitations on capability too - the Kubota ones are quite capable for the size.
Another option, if you work out your total cost to change, would be to buy a second machine - a mini-excavator. They can be found relatively inexpensively (even if they're a bit worn or ex rental units). A mini-ex would do twice or more as much work in a day as a tractor backhoe, and two machines is always better - say if you have your tractor with the trailer on it, load it with the mini-ex, then tow it away for dumping. Or if a friend or your life partner wants to drive one machine, one of you can be digging, another taking away spoil with the FEL (we did this when I dug out my tractor shed, and borrowed my father's mini-ex, and it was way quicker and more fun with two of us and two machines).