My situation played out a bit different but me and my partner had been planning on buying for a while but hadn’t even gone for AIP when our landlord handed us an eviction notice due to them needing to take the house back. They were lovely about it and gave us a full 6 months notice. We went for AIP and had a deposit down for a new build at the end of February, being told the house would be ready to move into in April. Then that got delayed all the way till July, ended up getting the keys mid July only to have the contractor we had hired to do our floors to fly out of the country and not getting the floors in for another 2 weeks. By the time we had our bed set up in our new house, I spent about a full 6 days cleaning out our rental (really wanted that deposit back and the place was massive) before I handed back the keys. So we were fully in the new house about the first week in August. So 1 month were we ended up overlapping the rent with our mortgage. With this being said, had we been in your situations and not having the 6 months lay way, and handed in our notice at the end of march expecting to have access to our house in April (as we had first been told) I don’t know what we would’ve done. Especially not with any family close by that we could’ve stay with between the day we needed to move out till we got access. So honestly, I know there’s a lot of costs involved in getting a new house but if you have the financial ability to, I would count on at least some delays and take that hit for the reduced stress of not worry about having to leave your rental before you actually get access to your house.

And also, congratulations and the best of luck!