Age-. The general rule in the industry is that once an A/C unit reaches 10-15 years, the idea of replacing the unit is usually a much better investment than putting money into an older system. If your system is at this threshold, it's usually wise to begin expecting, not wondering, when the system will fail.
You can keep the money in the TSP after you leave your federal job to benefit from the low fees, or you can roll over the money into an IRA or a new employer's 401(k), 403(b) or 457.
Within 60 days of receiving the distribution check, you must deposit the money into a Rollover IRA to avoid current income taxes. If taxes were withheld from the distribution, you would have to replace that amount if you want to roll over your entire distribution to your Fidelity IRA.