DD1 is currently in 3 y/o preschool 2 mornings a week. She seems to really enjoy it (but is not necessarily getting anything out of it other than socialization, which is the reason we signed her up). Next year, preschool is not in the budget for us. I watch a baby now, which is partially why I wanted to get her out of the house to be around kids her age and which is also partially helping to pay for preschool. Next year I won't be watching the baby. There is not a whole lot to do for the preschool age around here, except storytime at the library, which we already do, and playdates, which we also do. I feel bad that we even bothered to send her this year since she won't be able to go next year. I mentioned to her that she is not going next year and she got pretty upset. Tell me that by next year she won't even care and she'll do just as well staying home.
Re: Help me feel better
That is hard. I'm sorry you're in a tough spot. Honestly though, if you had the will-power you could set her up for a learning hour every weekday your home. There are a ton of online guides and blogs to doing pre-school at home. This way you could see to it that she is still on track academically. And as far as socialization and learning classroom behaviors you could possibly find a simple ballet/soccer/gymnastics class that would cost way less than a pre-k cost.
And really, being at home isn't really going to hurt her. It's great that she'll get that time with you, and you with her! She has plenty of time in her life to be away at school.