Iowa - 3rd conviction for meth w/intent. Already sentence to 30yrs prison. Questions regarding sentencing vs. actual time served & forfieture laws

How much time will a person actually serve in prison on a 30yr meth conviction in Iowa? I have been told someone will be paroled in 41 months but I thought, and have read in numerous places, that 1/3 of the sentence must be served. The projected release date on the Dept. of Corrections site is for 2024. Is that the release date or is it still possible they could be paroled in 41 months and that is the duration of the parole? Does the age/health of the offender have any bearing? Also, I see "forfeiture" and "title transfer" on the docket now. Do they seize houses/property even if there is not much equity? Where can I submit an open records request to obtain all sentencing/conviction records regarding the projected parole date/liens, etc. in Polk County, Iowa? I already have viewed the on-line docket but would like more comprehensive information. Thank you.