My dog used to go out every morning on a very long leash to do his business, what happened?

I have an almost 2 year old shitzu/bichon mix. I adopted him about 6 months ago. I am a pet care provider (at other people's homes) and house sitter. It's very hard in this economy, in our area; to get that kind of work. I do have another job, just in case you wondered. I would have brought my dog with me so he could have companionship/a playmate while I watched the other dog. Since I've had my dog, I haven't done pet sitting hardly at all. I bring my dog to doggie daycare once weekly (it's what I can afford)..........He has a great time and always looks forward to the next week day when he'll go. Now to my problem.....First thing when we woke up in the morning (he's my bed buddy......lol) I would put him out on a leash first to go pee-poo in our yard............he was great about this............that way I could run to the bathroom myself, prepare his meal, and make my coffee. He was out there maybe 5 or 10 mins. doing his business.............but after he started daycare (I figured this one out today).......he wants/needs to be walked "every time" he needs to do his numbers.......every time.........he is usually walked twice daily for 20-30 mins at a time plus has outside time...........This bad habit started maybe two weeks after doggie day care. Because he was out with the other dogs and because the handlers walked them several times...............but now to think of it.........I think it's because for the past several weeks, because of the ground, they had to stay inside when he went to doggie day care...........so.............he was walked Every Single Time he had to pee or poo...........He is taken outside and walked every single time...........not on a leash or run.............but has to be walked..................I am thinking of taking him out of doggie daycare until the dogs can get back outside.........or finding another day care for him where they are outside a lot and free to run and play.................this is not o.k. or pleasant for me to have to take a 20 min walk 5-6 times per day on demand............Love my dog, don't get me wrong.......................but we had a good thing going on.............lol............and now...............