Luckily for you, maintenance is capped in Texas to a maximum length of 3 years unless your spouse is unable to work due to disability/incapacitation per Family Code § 3.9605
Child support in Texas is a straight percentage of the NCP's salary.
Alimony is the lesser of $2500/month or 20% of the obligor's salary.
info here
There's no guarantee she'd get maintenance at all, by the way - so this is something you really should speak to an attorney about!

