I think some of it depends on what kind of trip you want. We like a lot of resort time so we like to stay where we can enjoy lots of R&R around the resort(s). We always have a car so we can visit others besides the one we’re staying at, too (or go offsite), often to go to restaurants or just walk around and shop, etc. But if it’s their first trip, they might have more park time in mind. You should have a conversation about it with them, then you can plan accordingly. People do get tired after early flights and running around and such, so IMO it’s good to build some down time into your plans.
If you’re budget-minded and you plan to do parks every day, somewhere like Pop Century might be a nice option. As a pp mentioned, it will save you some money that you can spend on other things. There are basic amenities there like pools and a quick service restaurant, but no slides or table service restaurants and such. We’ve had plenty of great stays there on park-heavy trips, and even with friends, and now they have the Skyliner which would make it easy for you to get to other places like the Boardwalk area if you want a change of pace and more food options, etc.
If you want to spend a little more and have some better amenities, the moderate resorts are a nice option, too. All have their pros and cons. I would suggest getting a good book about Disney travel and studying the options to see what theming and location you like best, etc. (You can see our favorites in my signature!)
Of course the deluxes are all nice but these days are oftentimes quite expensive. Depending on when you go and where you stay you can sometimes come across a good deal, though. Again, favorite theming and location are things that we spend a lot of time around here arguing about, lol. In other words, everyone has their favorites for their own reasons. Shades of Green certainly is in a nice location! We’ve enjoyed many stays at the Dolphin, as well. (There are ways you can get the price down there, too.)
We’ve done quite a few split stays and honestly, it’s a pain in the butt and I often regret it. I’m all about relaxing at Disney and I find that packing up and unpacking and waiting for rooms to be ready and all that eats up a day, so it’s not worth it to me. BUT, if the right deal comes along and it works in that way, then we’ll do it. But it’s not my favorite way to do Disney. Others may disagree, and YMMV. I hope that helps a bit.
There’s a lot of research to be done when planning a WDW trip! But planning, really, is half of the fun.
