Wars tend to be expensive...
And need to be paid for. That’s the inconvenient bit.
Any plans to tax citizens?
No - the plan is to kick out as many people committing welfare, social security, election, and every other kind of fraud costing the taxpayer and that pays for the war without increasing taxes. Trump just got $70B for immigration and border enforcement through the end of his term. Estimates are that the AVERAGE illegal is costing us $70k per year. $70B/$70kperyear/2.5years = 400,000 illegals.
So once we hit 400,000 illegals (we’re past that, by the way) every additional illegal removed puts $70,000/year back into the budget.
It’s REALLY not rocket science.