Why not let another seasoned STR operator cohost and you keep more of the upside without having to concern yourself with day trading on day operations?
Are you concerned that it won't do well as an STR?
John, sounds like a great opportunity for someone in the arbitrage space, especially with the lake frontage. Assuming the HOA is on board with STRs and subleasing, I'd expect you'll have operators interested pretty quickly.
John, before deciding between a lease to an operator and a co-host, I'd check two things first: whether the HOA allows short-term rentals and subleasing (plenty of condo docs ban one or both), and what your co-owner agreement says, since a long lease or an STR operation usually needs both owners to sign off.
If both are clear, the trade-off is pretty simple. A lease to an arbitrage operator gives you a fixed check and almost no work, but you give up the upside and the unit takes STR wear and tear without you controlling how it's run. Ask for an STR-specific lease, proof of the operator's liability insurance naming you, a solid deposit, and the right to see their reviews and calendar.
A co-host or manager on a percentage keeps more of the income with you and you keep control of the property, but your income swings with the season, and a lake condo will have a real summer peak and a slow winter. You'd also carry the furnishing cost and the STR insurance yourself.
If you don't want any part of the day-to-day and the HOA allows it, the lease with a well-reviewed local operator is the lower-stress option. If you want the most money from it over time, the co-host route usually wins. Do you know yet what the HOA allows?
Id be leery of the arbitrage people. Im sure are good but a lot of the ones in my area are bottom of the barrel. Have minimal experience and minimal cash and will bail on you the minute things get tough. If you do it, make sure there are personal guarantees and significant deposit.
If it looks to be a strong performer, I agree with the above to have a designer do set up and have a good local company manage or co-host.