I am having difficulty with a visualforce page recognizing an object variable on an extension. I have a feeling the problem is with my getter method, but I am at a loss for how to fix it. Attached is my controller and page...

Page:
<apex:page standardController="Account" extensions="RSOLeaseExtension" tabStyle="Lease__c">
<apex:sectionHeader title="New Lease Request" subtitle="Lease Form"/>
	<apex:pageMessages />
	 <apex:form >          
		<apex:pageBlock title="Lease Form" id="Lease">
			 <apex:pageBlockButtons location="top">
                <apex:commandButton value="Save" action="{!save}" />
                <apex:commandButton value="Cancel" action="{!cancel}" immediate="true" />
            </apex:pageBlockButtons>	
            
			<apex:pageBlockSection title="Account Details">
					<apex:inputField value="{!ls.DBA_Name__c}"/>
					<apex:outputField value="{!ls.Merchant_Number__c}"/>					
					<apex:inputField required="true" value="{!ls.Request_Type__c}">
                  <apex:actionSupport event="onchange"  rerender="Lease" />				
                </apex:inputField> 					
					 
			</apex:pageBlockSection> 
      </apex:pageBlock>
			</apex:form>
</apex:page>

Controller:
public with sharing class RSOLeaseExtension {
	private final Account account;
    
    private Account acc = null;
    private Lease__c ls = new Lease__c(); 
    public String reType = getRequestType();
       
    public RSOLeaseExtension(ApexPages.StandardController controller) {
        this.account = (Account)controller.getRecord();
         
        if (this.account.Id != null && acc == null) {
            acc = [SELECT Id, 
            	Bank_Lookup__c,Bank_Lookup__r.Name,
                            OwnerId,Owner.Phone,Owner.Email,Merchant_MID__c,Name
                    FROM Account
                   WHERE Id = :this.account.Id];
        
     	ls.Merchant_Number__c = acc.Merchant_MID__c;
       	ls.DBA_Name__c = acc.Id;
        
        ls.Bank_Alliance_Name__c = acc.Bank_Lookup__r.Name;
        
        }  
    }
    
    public Lease__c getLease() {
    	return ls;
    } 
   
    public String getRequestType() {
        return ls.Request_Type__c;
    }  
    
    public PageReference save() {
        PageReference savePage = null;
        Savepoint sp = null;
        RecordType lsRec = [Select Id,Name from RecordType where Name like 'Lease%' and SobjectType = 'Lease__c'];
        try {
            sp = Database.setSavepoint();
            
            insert ls;

            savePage = new PageReference('/' + ls.Id);
            savePage.setRedirect(true);
            
        } catch (System.DmlException de) {
            ApexPages.addMessages(de);
            Database.rollback(sp);
        }
        return savePage;
    }
    public PageReference cancel() {
        PageReference cancelPage = null;
        
        if (account.Id != null) {
            cancelPage = new PageReference('/' + account.Id);
        } else {
            cancelPage = new PageReference('/001/o');
        }
        cancelPage.setRedirect(true);
        return cancelPage;
    }

}

 Thank you for any help!!!!