Sleep sack or pjs ??

Cindy

I know I’m probably overthinking this. But my 3mo sleeps well in halo sleep sacks. Without the swaddle. I put him in a long sleeved onesie and a sleep sack for naps and at night. But I only have two and he spits up a lot. Also they’re $20 for one so I’m not too keen about buying more. But I’m so worried about putting him in footed pjs and him being too hot or cold. What would you guys do?