Seems like you have the options covered. My one question stems from option #3. When have the Twins ever used money "saved" to bolster a roster in the future?
If, and it's a BIG if, after moving into Target Field the goal was to have a 50/50 revenue to payroll split, the Twins have been over budget just once. That was in 2011, their 2nd year playing at Target Field - and coincidentally the first year of Joe Mauer's contract. Since then the average savings would be over $17MM per year. (using statista.com for team revenue and Cot's Baseball Contracts for player salaries)
In my perception, money "under budget" goes straight into the pockets of ownership (or probably to polish the gold plating on the Gulfstream) never to be seen again. Or, if ownership has been "saving it up for a big splurge," the Twins should have an extra $161MM to spend. Which way do you think we're headed?