This weekend is the RSGB's 2m/70cm contest. If I remember, I intend to pop on occasionally with my 10W and omni, but I doubt I shall put an entry in. It runs for up to 24 hours from 1400z Saturday, although there is a 6 hour section in which you choose which 6 hours you want. The 6 hours can be split up.
See https://www.rsgbcc.org/cgi-bin/contest_rules.pl?year=2022&contest=mar144432 .
A popular 2m70cm/23cm transceiver is the ICOM IC-9700.
See https://sites.google.com/view/g3xbm4/home/vhfuhfmicrowaves/vhfuhf-commercial-rigs/ic-9700 .