Going and coming back, it looks like it'll be about a week total.
Literal
Go-[and-て] return-[and-て], total 1-week [about-ぐらい] [attributive-の] schedule [as-に]-become-[seems-そうだね].
Casual travel-planning speech. 行って帰って ('going and coming back') is a stacked te-form sequence. トータル ('total') is wasei-eigo. ~ぐらい ('about, around') is the casual/colloquial equivalent of ~くらい. ~になりそう 'looks like it'll become.' だね casual confirmation.