BT Home / Business Telephone and Broadband switching to just one or another provider

Hi
We need to cut back on our expenditure and am in need of any helpful advice/suggestions please.
We live in the countryside. My partner has an office (with BT business phone line /business broadband) at the end of our garden. Our home is 18 m away with separate home BT phone / broadband set up.
We have BT Sport, Sky tv and five of the family are with Vodafone mobile (signal is terrible in the area, so going through wi-fi). All three are out of contract now.
We definitely need to keep the business phone line /broadband. Is there a way to just use the these for the house but with still a strong signal for use in the house and upstairs. Broadband use is just shopping/streaming.
Will BT permit home use going through Business line /broadband if we still want BT Sport?
We were considering ditching Vodafone and switching to BT/EE to save but worried about reception even if going through wi-fi - which seems to be dropping regularly at the moment.
I am sure that we can save money but it is a bit of a minefield from someone not technically savvy :-)
Many thanks in advance for help.
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