I have a baby who will only sleep if in buggy. Is rocked/fed/sung to at home. Never slept alone (is nearly 18 months!). Will be doing long days but I cant be tied to buggy only naps. Any tips??

Not much help, but all my babies (until 15/18 mths) sleep in lay flat buggies, preferably outside.
I have a 'rock-it' that attaches to the buggy and vibrates, making the buggy rock and that generally is enough to get them off until they learn about sleeptime! I also introduce a muslin so they associate that with sleeping!

However, if yours is a bit older to start with, i would decide where they will be sleeping and just teach them how they sleep at yours. (Mine sleep on mats on the floor, or in a travel cot) Sitting next to them, patting their back, saying sussshhh etc. I put 'mindful' music from YouTube on and they all sleep/ rest with it on.

Good luck. I usually find that they get the hang of sleeping pretty quick. I would be tempted to start off in the buggy if that is what they are used too.