The collateral limits are in place because it keeps the piolits safer from ganks. As long as you're not over the limit you are fine. The typical 'safe limit' is 1-2 bil since people are less likely to Gank you at those loads vs someone coming through with 5+bil in cargo. I run a freighter service and I use that same collateral limit for that reason.
I also assume that your package is in lowsec (ie 'one jump from high sec') may take more time, in my experience, because you'd need to wait until someone is willing to go there - but you would have more luck in that end if you use a service like Black Frog where the piolits utalize jump freighters to get items safley from low/nul.
Thanks

I didn't find the right solution from the Internet.

References: https://forums.eveonline.com/default.aspx?g=posts&t=523397&find=unread

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