Ok already solved it!

I was missing the custom default provider for the profile in the web.conf and needed to set the property there, another way is to set this property is to create a class which inherits from Providerbase and add a property there:

<system.web>

...

    <!-- Profile provider-->

    <profile defaultProvider="UmbracoMemberProfileProvider" enabled="true" inherits="UmbracoFramework.Models.MemberProfile, UmbracoFramework">

      <providers>

        <clear />

        <add name="UmbracoMemberProfileProvider" type="umbraco.providers.members.UmbracoProfileProvider, umbraco.providers" />

      </providers>

      <properties>

        <clear />

        <add name="home" allowAnonymous ="false" provider="UmbracoMemberProfileProvider" type="System.String" />

      </properties>

    </profile>

</system.web>

Now it works like this:

        [HttpPost]

        [ActionName("MemberLogin")]

        public ActionResult HandleMemberLogin(MemberLogin model)

        {

            if (!ModelState.IsValid)

            {

                return CurrentUmbracoPage();

            }

 

            if (Membership.ValidateUser(model.Username, model.Password))

            {

                FormsAuthentication.SetAuthCookie(model.Username, model.RememberMe);

            }

            else

            {

                ModelState.AddModelError("Username", "Gebruikersnaam of wachtwoord is onjuist.");

                return CurrentUmbracoPage();

            }

 

            var memberProfile = ProfileBase.Create(model.Username);

            var propertyValue = memberProfile.GetPropertyValue("home");

 

            if (propertyValue != null)

            {

                int pageId = Convert.ToInt32(propertyValue);

                return RedirectToUmbracoPage(pageId);

            }

 

            return Redirect("/");

        }