Many years ago one of the woodworking magazines did an in depth study of glue joinery. Doubled biscuits and doubled dowels were nearly as strong as a tight mortise and tenon joint. I like biscuits because they are quick and somewhat forgiving when gluing up. I also have a good quality doweling jig and it does a good job too. It just takes longer to set up and perform the joint. I size dowels at 1/3 the thickness of the wood being joined with an equal amount of stock all around the dowel. If money is tight, buy a good doweling jig and brad point bits. Later, when you have the coins, upgrade to a good biscuit joiner. I've had a DeWalt unit for nearly twenty years and it works fine. My B-I-L has a Lamello unit that I first used, but I liked the fence on the DW one better. The PC unit that was around when I bought my DW was a good one too. I also have a Ryobi mini-biscuit joiner, but I seldom need biscuit joins that small.
I've gone out to find myself. If I return before I get back, have me wait for me.
"Sawdust is Man Glitter"