The actual implementation, server or client, really doesn't change anything though client side would likely be a better choice for this application. What takes time is the field by field validation - test for numerics, dates, value ranges, etc.
Not knowing your computer programming expertise, how quickly you learn or how much time per day you can devote to this project it would be impossible to guess how long it would take you to do this. Depending on exactly how much validation has to happen I would estimate a competent Outsystems developer working full time could do this in two or three weeks. This is just for what is described in the original post, not including everything else that would complete your 'portal'.
Hope this helps,
Curt
Not knowing your computer programming expertise, how quickly you learn or how much time per day you can devote to this project it would be impossible to guess how long it would take you to do this. Depending on exactly how much validation has to happen I would estimate a competent Outsystems developer working full time could do this in two or three weeks. This is just for what is described in the original post, not including everything else that would complete your 'portal'.
Hope this helps,
Curt